Countryside Locks has provided a number of replacement Atrium locks to me over the last several years.
Countryside provides great service.
Atrium locks have a beautiful appearance but very poor reliability.
My experience, now that I have had to replace 3 of them, is that Atrium locks regularly become inoperable through use. This is a design defect inherent in the Atrium lock design: called it planned obsolesce or insufficient design for a mean cycles to failure MCTF that is 10 to 100 times too small. That said, I do hope that Countryside will continue to stock Atrium replacement locks, because once you commit to them in your doors, nothing else will fit -- you will have to replace all the doors with these locks installed. Best case is that Countryside prevails on Atrium to upgrade their lock design so it no longer fails so frequently.