I bought this almost exactly 3 years ago. I have never had any issues with my code not working. I have never had a door handle fall off. In fact, I like this door handle so much for my garage inner door that I purchased a 955 version for my inner door I need locked away from rental guests. Just as easy to install as the first. 
My only “complaint” is that for the 917 I accidentally threw out the R screw and I would love to add it now. Oops. Nothing to do with the product, just user error.
Depending on my next house I’ll buy at least one more.