I've had no problems getting the under glass finger print sensor to work (although this phone is not the best by any standard, it is very slow, there have been many firmware updates to improve it, and it has got slightly better with each update)
Item is really easy to apply, no bubbles, great instructions, and the fit is good. Not really much more to say. I've had my phone 18 months now and also use a hard case for the body, so it is still in perfect condition.
Oh one other thing I've just thought of...The glass protectors do seem very hard wearing, I don't think any of the screen protectors have ever shown any scratch marks ofr wear scuffs, like others I've seen. You can pay a lot more for screen protectors but I think these are more than suitable at this price.