Taking apart the existing deadbolt took longer than installing the new one. Setting up the new one to work with WiFi, also, only took a few minutes. Overall, I'm very pleased thus far! I've only had it installed for a little over two weeks so far. The battery life (four AA Duracell batteries included) was at 99% upon installation; dropped to 83% two weeks in. So, I disabled the "auto-lock feature" to save a little battery usage. I give the lock feature 5 stars, ease of installation 5 stars, and didn't rate tech support, since I haven't needed it yet ... and hope I never do. ;)All members of my household simply love it, especially those who jog and don't need to take their keys along with them anymore. Eventually, I bought the door handle that matches, and it was a cinch to install as well. :)