David happened to be in the general vicinity, so he was at our house within 15min. He thoroughly examined the electronic door lock we were having problems with (would not lock/open properly with the keypad, codes didn't work and even the key didn't seem to work). He took everything apart, found the problem, cleared out all of the old codes, showed me how to look up coding instructions on-line for all of the functions, re-coded the lock, and tested it again thoroughly. He was extremely patient and helpful walking me through the instructions and is a very personable young man. Replacing this lock would have cost us double the amount of his service call so his being able to fix the problem saved us quite a bit. Extremely professional and incredibly nice - I will certainly use him again and could not recommend him more highly to anyone in need of a locksmith.