I purchased a Stack On in wall gun cabinet awhile back and it came with a keyed lock. I've been looking for a digital combo solution to retrofit it with, but haven't been able to find one that worked / fit.This unit has come up on my research a few times but I couldn't swallow the cost. Ultimately however, after multiple failed attempts at cheaper solutions I decided to give it a try. It fit perfectly, works as intended, feels of high quality and I'm very happy with the end result. While a bit pricier than I wanted, it ultimately is exactly what I was looking for, and I feel confident in its quality and design. Compared to similar in wall cabinets with built in digital entry I'm still leaps and bounds ahead financially.