Solid Package Deal
Each individual piece is great, and as a package, it's solid. The ATC is basically the standard of modern belay/rappel devices and the simplicity of it shows you why. The AirLock2 'biner is stellar, a wide mouth to swallow up messy belay stations, and a smooth gate sleeve action to make sure it opens and closes when you are getting pumped. I do have one thing to say about it though, it tends to, in my personal experience, cross-load during a rappel. I think it is due to the shape, the whole 'biner loads almost angular, but is not a problem if you pay attention to your system.