Very easy to use. Same basic modes we've come to expect from similar models, and much more powerful than Quip or anything you can get in-store at this price. Changing brush heads is very simple - just pull off the old one and shove on the new one. There's a little gap at the bottom of the brush head, which the instructions say is on purpose, which gives it a cheaper feel but doesn't seem to negatively impact performance. My previous similar brushes all had to screw on the head and it would take a lot of effort.
It doesn't come with a charging base or wall wart, but in our house we already have way too many of those anyway, and it does come with the USB cable. It also comes with a stick-on holder that you can attach to glass or tile that then holds the brush by the brush head, but I've not tried that because I don't have a suitable surface in my bathroom. It stands up just fine on the counter.