I got this to pair with my Fire HD 10 tablet, to play Luna games on it.
The downside for me was the instructions. They were written in good English, but with print so small and faint I had to resort to using a magnifying glass to read it. That was a little ridiculous. Also, if it was in the instructions, I didn't find mention of how to charge it. I plugged the controller into a USB A outlet I have on an outlet extender, and the screen illuminated with an icon of a battery with a lightning bolt through it. No sign of how fully charged it was. I looked online and found that if you wait eventually bars will appear. When I looked the next morning, indeed there were full bars.
So, I unplugged it and connected it to the tablet via Bluetooth. That sync was very easy to accomplish. I did note that unlike my Xbox controllers, this has an actual power switch on the back. Different, but not better or worse in my view--you may have your own opinion about this. The heft and feel of this is very comparable to my Xbox controllers. It might even be heavier. It certainly feels solid and looks really well put together. The grip has that pronounced bumpy feeling so it's not going to slide around in your sweaty hands.
I'm not professional at gaming, but for gamers the ability to customize the buttons on screen is probably an important feature. I couldn't be bothered since it's hard enough for me to learn the default button layout the games coach you on, plus the difficulty in reading the small print in the manual is real.
The game play for me was every bit as good and solid as playing with the Xbox controller that came from Microsoft. Note this won't work with an Xbox. To me that, and the fact you cannot replace the battery for one with a bigger capacity, are the biggest downsides to this controller. And after I played for a short while and plugged the unit back in to fully charge back up, it was back to showing no bars for a while. It couldn't have been dead yet so that charge indicator would be a good thing to fix with the next software update if they do that sort of thing.
Overall, if this could be used with my Xbox, I think I might've preferred it to the original equipment. But for the unreplaceable battery. It just looks sharp and feels like a high quality piece of equipment in the hands. And the price is competitive with the original equipment so I think it's a fair and reasonable proposition. Happy I got it, and if you understand these limitations and they won't bother you, I can recommend it to you too.