We decided to go with this type of lock because our son kept leaving his key or losing it . We were able to install it without any problem. Programming it was easy too. I followed the instructions and we were good to go. Now my son rushed out in the morning and just pushed a button to lock it. In the afternoon I do not have to worry about him being locked out of the house. We have had it less than a year, but have had no problems so far. I have replaced the batteries once. I have even changed the codes a couple of times with no problems. So far I am pleased with this purchase!