Quality construction, but have a spare battery handy. The setup is simple with ewelink (Sonoff Basic R2 Smart). Slim and elegant!

It worked for 10 days... then you have to press it 6-7 times... and eventually after a few months it stopped working... it gave up. Unreliable for sonoff

I use it to do a return on the sonoff t2 that I have.
1st day today it works perfectly, responds immediately with new batteries.
I will return if I find anything negative because the reviews worried me before I made the purchase.

10 days after use, no issues. I try to find something negative but everything is still fine.

After 1.5 months, I haven't encountered any problems.
I believe that anyone who wants it for sonoff t2 switches will not face any problems at all.

After a period of use, the only negatives I noticed are
1st that the batteries run out in 6 months
2nd that about once a month the switch may freeze for 30 seconds with the indicator waiting without functioning. But then everything is okay again.

As others have said, the switch does not do the one thing it is intended for. It does not turn on/off the light! When you have to use it, it will work (if it works) on the 5th - 6th try. After that - repeatedly, it may work immediately.
In a vacation house, where the switch was installed and used for 10 days, when I went back after 8 months, it simply never worked again. I have no name RF switches from deep China (non touch), which I have been using daily for many years (over 4-5) and I don't think I have even changed their battery.

It simply doesn't perform the basic function for which it is intended, to turn on and off a light! I have it connected to products from the same company. It connected easily, without any disconnections, but it doesn't have a good response when pressed. You have to press it 5-6 times to give a command.... Sometimes it will register a double press.... Very rarely does it work on the first try and it is also very rare for it to register a second correct press within 15-20 seconds... The batteries didn't even last two months, and that's without any use. It was simply connected to the hub... I would like to know if someone has used another switch, from a different company with the same characteristics, without the need for grounding or neutral connection, and compatible with Sonoff products. I should note that countless tests were done on 3 such switches! One single, one double, and one triple...

The touch after a few weeks does not work. You may need to press it 10-20 times to activate it. You can only operate it properly through the application.

I connected it through bridge rd, it always works as long as it has new batteries, meaning I have to change them every two weeks. I don't think it's worth it that much

I bought 3 switches because I wanted to avoid digging to install new switches in the house (combined with Sonoff Slampher).

Positive
- low cost (costs as much as a conventional socket)
- can be installed either with double-sided tape or screws (included)
- no additional actions required other than the initial setup with the corresponding product

Neutral
- batteries are not included

Negative
- often times the switch needs to be pressed more than once to turn on or off the light (usually the issue is to turn on).
- it only lights up when the user presses the switch.

In summary, for the job I needed it for, it was worth it.
However, I would prefer not having to press it 3-4 times to turn it on.

It collaborates with the rf devices of the company (Sonoff rf switch and the rf bridge). As it has both 3M adhesive and screws, it is a practical solution to "stick" it in any point that suits you to operate your device. The good thing is that even if some of your devices are not RF, you can create a scene and activate it with this switch in combination with the rf bridge, of course. The downside is that 2-3 times out of 10, the switch "doesn't respond" on the first contact and you have to try again for it to work. This is probably due to the touch technology itself, but also to the fact that it operates with batteries that probably go to sleep to avoid consumption. The LED light activates when the contact is successful, while it is off before. The other touch switches from Sonoff (wifi series TX-T2 with live and neutral) that I have, work without failed contacts.

The purchase was made to work with the Sonoff RFR3 switch that operates through a wifi application and also through rf. In this case, the use of rf was selected.

The installation and cooperation between them are very easy.