Controller is quite heavy (including probably because powered by 2 AA batteries) and a Playstation controller Opa last 20years but getting used to for me. But yes everything works after calming certain time.
The buttons clatter a little much for my taste, but that is possibly away sometime after some Time. We'll see.
Otherwise, it responds super, no problems. FireTV turns so that when you press the Home button.
For coils, Pause etc, I use the remote anyway and not the controller, but will probably fold well.
Therefore I am quite happy.
All in all I'd say 3.5 stars.
Rattling and price are the negative points.