[villagetinker]

There were previous threads on this, however, I installed my own, fairly easy, and I like the lock. One word of caution, the screws supplied to attach the lock to the front surface of the slider were TOO LONG, and if I had not checked, I probably would have cracked the glass ($$$). I used a grinding wheel to shorten the screws. I did not have this problem when I helped a neighbor install theirs, so this maybe random depending on how the sliders was assembled.

If you are installing yourself, read the instructions carefully, do NOT force the drill, and double check the hole depth before installing any screws.
Hope this helps.
I was going to suggest sending a PM for additional info, but currently I am not able to read or reply to PMs.......