The machine is exactly what it should be. Precise and durable. It is absolutely accurate and those who have noticed small deviations between its readings and the readings of their car's TPMS system (tire pressure indication) should keep in mind that they should trust the indication of the Michelin compressor and not the car's. The same applies to the meters at gas stations or even at tire repair shops, which unfortunately, most of the time, are unreliable (with a cost of up to 15 euros), despite serving professional use. After all, they are analog meters and not digital ones, which do not screw on but rather attach hastily, resulting in their readings not being perfectly accurate, unlike this compressor here. Also, keep in mind that until you go to the tire repair shop for a check, the pressure has changed by at least 0.1 bar upwards. Because within a distance of 1-2 km, even with a cold road surface, the tire warms up, so it increases the pressure slightly. Do not forget to measure the pressure on completely cold tires then. The machine measures pressure, it does not cool tires. Personally, for me, the indication of the compressor matches the indications of the cars I use (BMW and Nissan). I have been using the machine for two years and it has fallen from a height onto concrete, but it hasn't been affected at all. It is advisable to operate it with the engine running. Read the instructions before use.

I have had it for 4 months.

The positives are that you can choose the pressure you want it to reach and let it do its job. Also, you can set the pressure in bar, kpa, and psi. It has 5 small LEDs on the front that are quite useful if there is not enough lighting when you use it. The construction is made of plastic. You can't say it's bad, but it's not perfect either. All the cables (power and air) fold and are placed inside the main body.

Now for the negatives...

1) It is placed on the threaded valve of the tire, which is a bit tiring if you want to check the pressure on tires of 2 cars (let alone more). Thinking at the time of purchase that it was probably for accuracy reasons, I decided to overlook it (wrongly, as you will read later).

2) It does not take power from a regular household socket, only from the car's cigarette lighter.

3) It seemed inaccurate to me at first because my car has a tire pressure sensor and the measurements always differed by 0.1 bar, and sometimes by 0.2 bar. I checked it for verification with the professional machine they have at the tire shop where I change tires, and it confirmed my claim of inaccuracy. I thought it was just my machine, based on what I read in the comments, so I chose not to write a comment then. A friend of mine has had it for a month now, and I had the opportunity to check his as well. Same thing. It differs by 0.1 bar compared to the car's measurements and the tire shop's measurements. (Also, neither of the two machines does a start-stop on the motor when inflating the tire. And the same behavior is exhibited by machines and other users online. So, it does it for some and not for others. Different programming per device?) And okay, the 0.1 that it falls short of is not something tragic if you look at it individually. But if you think that it costs 70 euros and bears the name Michelin on it, then...

4) Therefore, the 70€ it asks for are quite judged. It is neither extremely powerful nor as accurate as it should be for this price.

In conclusion, it is not a bad machine, but for its price, it does not do what it promises perfectly. If we even look at the competition, at this price (9 euros more at the moment I am writing this comment), there is the Black & Decker BDCINF18N-QS, which takes power from a regular socket, has more functions (can add and remove air), is more powerful, and is attached to the tire valve by a clip, so you don't have to screw and unscrew it by hand. In fact, when I was shopping, it was on sale for 5 euros less than the Michelin (at a large electronics chain), and I made a mistake not choosing it and trusting the name Michelin. So, the assessment is minus 1 star for the price compared to the capabilities and another minus 1 because it should have been very accurate due to its name.

Update 20/03/2020:
I have had the B&D compressor that I mentioned above in my comment for 20 days now. Unfortunately, it confirmed my claims about the inaccuracy in the pressure measurement that the Michelin does. The B&D measures exactly what the car's system and the tire shop's pressure gauges measure. At the same time, I inflated the Michelin to 2.4 bar for the front and 2.8 bar for the rear tires. Then I connected the B&D, which gave the following values: 2.2 + 2.3 for the front and 2.9 + 2.7 for the rear. Going out with the car to see what the sensor will measure after resetting it and driving for about 2 minutes, it gave the following values: 2.2+2.3 and 2.8+2.7.
The next day, I went to the vulcanizer (about 10 minutes away). By the time I got there, the car's system stabilized (because it constantly measures as the wheels turn) at the values that the B&D initially measured, namely 2.2+2.3 and 2.9+2.7. Both the analog and digital meters showed the same values at the vulcanizer.
Wanting to dispel any doubts and having both compressors with me, I tried to measure pressures (I didn't inflate as they had already been inflated) on another car that was there and had just had its tires changed.
And this test confirmed the measurements of the B&D.
After all this, I don't bother anymore because things are clear to me now.
Last 2 comments. Comparatively again, a) the Michelin is slower and b) it heats up faster (with all that implies for the engine's longevity).

Trusting the reviewers, I bought it.
Technical.
It provides 16 liters per minute of air when the competition provides 45, and its continuous operation should not exceed 10 minutes. However, I believe this is for the longevity of the compressor and for the auto function, it's okay. It can inflate a flat tire in 3 minutes according to the manufacturer. It can also inflate balls, mattresses (it comes with adapters that you won't lose). It has a default setting on the dashboard at 30 psi, and every time you want more, you press the + or - button. If the tire has a higher indication on the panel, for example, 36 psi, you slowly unscrew the nozzle on the valve to release air until it reaches the desired psi indication, then you unscrew it completely. If you see on the dashboard that it has less, you press the yellow start button and due to the automatic default setting (as mentioned above), it inflates to 30 psi, and if you want more, you press the + button. After 5-6 automatic start-stop cycles of the motor, you will see the desired indication stabilize. Don't forget to press the start button again to stop the air release from the motor as you unscrew the nozzle.
The psi indication on the panel is considered accurate compared to a psi gauge pen (made in England).
The light it has from the LEDs is strong and will help you if something goes wrong at night. The psi indication is illuminated. With the 5-volt USB port for a mobile charger cable that it has, you can charge your phone.
Build quality.
It comes with a fabric case. It is lightweight, works with minimal vibrations without jumping around, good quality plastic, and even though it doesn't have a handle, it doesn't slip from your hand. The nozzle is of good quality and has a coating, but I would prefer it to be longer, without it being inadequate, of course. The power cord and the 12-volt socket (which also has a fuse) are of good quality and have sufficient length.
Now, for the money, you get what you pay for.

I recently acquired it and after a few uses, personally, I was very satisfied.

Pros:
Small in size, sturdy and well-made machine that makes little noise during operation and remains stable, not shaking like cheaper constructions. Powerful compressor that inflates the tire very quickly, with a nozzle that screws tightly, without air loss on the tire valve. The electronic pressure indication on the screen is indeed accurate and with repeated measurements, the values are exactly the same. The programmable function is extremely useful and practical. You electronically adjust the pressure you want before application and as soon as you screw it onto the valve, it automatically calculates and displays the specific pressure of the tire. If it is too low, it automatically fills the air to the desired pressure.

Cons:
The only negative thing I can think of is that the price at 70 euros cannot be considered cheap, of course. But based on what it offers and its excellent ease of use, personally, I cannot consider it economically unreasonable. Considering that cheaper machines do not have such accuracy in measurement, take a long time to inflate the tire, and break relatively easily, I believe that in this case, the saying "you get what you pay for" applies.

As a final opinion, although I cannot yet judge its long-term reliability given the few days I have had it, it certainly does its job extremely well, very fast and practical, with 100% accuracy in measurements. In my opinion, a very good machine.