We picked Market st security services & key because he was very professional about answering our questions regarding re-keying our door, as well as putting in a deadbolt. We were very happy with his service. He was on-time, polite, and did a great job. He even re-keyed the deadbolt for free. I would take off a half-star if I could because he did leave behind quite a bit of sawdust from installing a deadbolt.