Our front door stopped closing properly because of the misalignment of the lock and I needed to fix the problem. I called Dallas Safe & Keys and David answered quite fast to my request. He asked some questions regarding the problem and came to us that same day to fix the alignment of lock. Since he was here, we also asked him to replace our old doorknob with a newer one and he did that job without any difficulties. Door works fine now and I would definitely contact him again.