Tanzhor If there is something better, I will definitely change it. But while he is almost completely satisfied with me.
At the expense of the button, I can say that I have no particular problems with it. On touch, I have a "Back", on a long touch - "List of running applications", on a double click - "Camera". Swipes on the button to switch between applications seem to me inconvenient. As for me, it is much easier to call the "List of running applications" and from there go to the right place.
With autonomy, everything is fine, the battery keeps well, the zhora was not noticed. I do not use applications and games that require large resources from the system. I don't know if Hearthstone can be attributed to them. At least it goes without lags. Well, again, the drawdown of the charge during the game, I did not notice.