Sometimes, quite rarely, though, the controller presses Start button by itself, in the middle of a gaming session. But again, very rarely. Top tier for its money.

Very good gamepad with a comfortable grip and excellent button response. It connects easily to PC and Android and works flawlessly. Excellent value for money.

Keep in mind that if the 2.4G adapter breaks, you will be left only with Bluetooth connection. In my case, I happened to break it, and there is no replacement part available for the ultimate 2c. More expensive models from 8BitDo offer the possibility to replace the adapter in case of damage.
That's why I give 4 stars.
Other than that, it's a very good controller — comfortable, reliable, and with good response.

Comfortable, lightweight, and you choose between wireless or wired. It comes with a Dongle for wireless gaming. Definitely better than the Xbox one.

Perfect and beautiful, good response whether wireless or wired, purchased for use on PC and mobile/tablet atm and on both it's perfect...
I will return for the durability.

I've had it for a few weeks now and I can say that so far it works great. It takes a bit of searching to make the most of all its features, but even out of the box, no one will encounter any problems. The sticks and triggers, which are hall effect, have a very nice feel and accuracy. I use it wirelessly and it really is a blast and hasn't disconnected even once. Its vibration is also excellent. My only complaint is that it is smaller than the XBOX One controller that I used for the last 8 years, so in my large hands, it's not as comfortable, but it doesn't tire me out during long sessions either. Now whether it will stand the test of time remains to be seen.