We had to pay for and emergency service call since my mom locked her keys in the door, so we asked them to change out some locks while he was here. I just assumed it would work fine - and we don't use our front for much.. but the front door lock barely works.. the bolt doesn't fully extend or retract (and he left the mechanism loose). He worked very slow then said he didn't have time to finish. The man was also non-communicative and never smiled once. They helped my mom out so that's why I rated 3 stars, otherwise way less.