This is the first grinder I’ve used, so I’ll talk about my experience as a beginner user.

As a grinder, it seems to be extremely effective. I use it together with the Delonghi Dedica EC685, with a bottomless portafilter by Joe Frex, an IMS filter DL2TH26E, and among beans I have tried Hausbrandt Academia and Lavazza Super Crema.

For the Hausbrandt Academia, I ended up with a 17g dose ground at setting 6 on the grinder. From 17 grams I get around 33–34 g of beverage in 25 seconds. So an exact 1:2 ratio and a perfect shot.

With the Lavazza Super Crema I haven’t experimented much, but the grind is somewhere around 6 to 3.

Cleaning is super easy since it includes a brush for removing leftover ground coffee from the grinder body itself.

The accessories included in the package are extremely useful. It has dosing rings for 51/54mm portafilters as well as for 58mm ones. It also has the jar for ground coffee, which also has a mechanism to remove the air from inside, so it becomes completely airtight. The bellows in the bean hopper is also tremendously useful so that no ground coffee remains inside the grinder mechanism and, as a result, not a single gram of our dose is lost.

Let’s not forget that you can grind your dose directly into your portafilter, with the support bases (again for 51/54mm as well as 58mm portafilters). Very convenient so the counter doesn’t get covered everywhere with ground coffee.

More coffees will be tested in the future, so I’ll keep coming back to update the grind settings, to help all fellow home baristas with Dedica machines.

An excellent grinder...
I didn’t expect to be impressed by the device, but it surprised me a lot. I have used many grinders in the past, and in some respects you feel like you are dealing with something much more expensive.
I use decaf coffee and it needs to be ground finer in order to get the desired result....but it does the job wonderfully. Besides, the 75 grind settings give you the opportunity to experiment...
The two points I singled out are:
The flow of ground coffee from the spout is very consistent and smooth, and no clumps are formed. I use the Dedica 51mm portafilter with a dosing ring under the flow spout. The plastic accessory intended for this purpose holds the portafilter in place. I can’t know what happens if you use a 58mm...however, other comments say that in that case the user needs to hold the portafilter during grinding.
Really...the device doesn’t retain any coffee inside at all...if you use the blower that is also included in the package...Such performance would be envied by much more expensive grinders. The spout is magnetic and cleaning is very easy.
It should also be noted that the burrs the device has are 6 conical helical ones...when most grinders in this range have 5.
It is relatively quiet...I believe the grinding speed does not exceed 300 revolutions per minute. (that is my own assumption; after all, there is no option to choose the speed)....and so it will take a little more time to grind the same amount of coffee compared to another grinder with the same watts but the same number of burrs...
The only thing that perhaps needs improvement is that the body of the grinder should have been metal...so that two purposes would be served at the same time...it would look more premium...and it would be more sturdy and stable on the counter...but then perhaps it would have been more expensive.

If you go ahead and buy it, you definitely won’t regret it...

Perfect!! Much better than the Melitta Calibra, which on the finest grind was at 18 compared to this one…. It really is worth its money and then some! I have it for the Rohnson Suprema

Owner for 2 weeks now. I come from a simple electric grinder. This gadget is a quality leap. It has features (e.g. the anti-static parts + the blower for the residues) that take it to another level and I haven't seen them elsewhere! It really needs attention when assembling, because for me too it didn't work immediately and I remembered the friend who mentioned it. I paid attention and everything clicked in just fine. I never store beans in the container, I only put in what I need each time and grind. It hasn't retained any residue. For the Dedica and the pressurized basket, the setting is at 13. Below 5 it would choke and wouldn't even come out. I attach the basket to the holder, put on the magnetic ring, and nothing flies left or right! Now with this machine I can understand the different qualities of coffee! For its price, it's super! Now I have to try the non-pressurized ones (even though now I get amazing results) and the Brikka, which require different settings.

First day with the Rohnson electric grinder.
It seems to pair perfectly with the Rohnson Suprema r98300.
First impressions are excellent. Plastic body but with a very nice matte finish. It comes with all the necessary accessories, covering everything from cheap home espresso machines with small portafilters to more expensive ones with heavy professional 58mm portafilters (see Suprema).

I won’t go into much detail about the technical specs, but mainly about the use and of course the taste. Even though it’s the first day, I managed to get familiar with it very quickly, almost without suffering a caffeine OD.

Usage:

Very easy! The magnetic accessories are, as we say, "satisfying"... They snap on very easily and as firmly as needed. The spout hardly retains any ground coffee because it’s anti-static. It’s absolutely safe because if you don’t attach all the parts correctly, it simply won’t work... For 3 minutes I was worried on the first try. Make sure you have locked the safety in the hopper correctly and it has clicked.
Unfortunately, I realized that the stand can’t hold the heavy stainless steel portafilter of the Suprema upright. Then I realized that if I hold it by hand, I get better distribution of coffee inside the portafilter and avoid wasted coffee on the counter. A quick WDT, leveling, and then tamp!
It’s important to use the bellows with a scale and single-dose grinding. This way you control the retention of coffee inside the grinding system and the staling of the beans! Retention is minimal! Not even a gram... So it’s good to grind, for example, 18.1g if you want a clean 18g in extraction. Press the bellow decisively and you’ll see the last residues come out.

Grind settings:

Hmm... I did the ultimate test... I put in the most stubborn light roast I had, grown at 1800m altitude. Very hard beans. The nightmare of every grinder. A batch that even my KINGrinder K6 struggles to grind fine enough to reach 9 bar. So, at the lowest setting, it ground it very well but not as fine as needed... Don’t worry, for a bit it didn’t manage with 18g. With 20g in the grinder and then in the portafilter, it would easily reach 9 bar! In short?... If you throw in your worst beans, increase the grams and it will manage!
A note here... I use a flat high extraction IMS basket. If you have your machine’s stock basket, you don’t need to grind THAT fine, so it will work PERFECTLY. If you have an espresso machine with pressurized baskets, you don’t need to know any of the above, ignorance in this case is bliss :)

Taste:
I grind the beans straight from the freezer, already stored in 18g single-dose tubes. They are ground directly while frozen for better distribution, fewer fines, and a cleaner cup taste. Here too, the grinder managed to give me a balanced taste in classic Italian dark roast espresso. I didn’t notice more bitterness... It preserved the coffee’s aromas and overall the feeling was balanced. Generally, conical grinders do better with medium dark roasts. Flat burrs bring out light roasts better. Compared to my amazing KINGrinder K6, I think it gave me a rounder taste and fewer flavor spikes. I’ll work a bit more with medium-light roasts and come back for an update. A video will follow too.

Conclusion:

So what are you waiting for? Get it! (The grinder)
If you also have the Rohnson Suprema r98300, it’s a perfect pair. It’s not the best grinder in the galaxy... There are €5,000 grinders! But what I think Rohnson has made clear is the value for money! For its price, it’s simply an amazing grinder. At the same price, there’s no competition.

Espresso wasn’t born for yuppies to show off... It was born out of the need for quick pleasure for workers as they go to their jobs. Focus on the essence... And the essence is that even the cheapest devices become valuable when you enjoy offering and sharing what they give you. That’s what coffee is...

And lastly... If you’re interested in joining the community I’ve created on Facebook "Rohnson Suprema Espresso Lab", to share and get information about the SUPREMA and espresso in general, we’re waiting for you here:
https://www.facebook.com/groups/738208462486524/

Amazing tool for its price! Very good quality materials, sturdy construction, relatively quiet compared to cheaper options. Made a huge difference in the result with Delonghi Dedica.