The fingerprint sensor works fine, the problem is that the button gets stuck a bit and doesn't have a reset. You have to press it high, otherwise it stays pressed and turns off.

Edit 2 months later, something probably short-circuited in the fingerprint recognition and the button was burning! I put the old one back on, which had the cable cut, since the Touch ID doesn't work here either, but at least that one presses better as a button