When Captin works, it's great. I have a logitech keyboard that does not indicate when the caps are on. When you're a fast typist, it helps to know whether you've hit the CAPS key or not. That's the purpose of Captin; it shows up in the menu bar at the top of the screen and lights up when it's working. The problem is: I can hit the CAPS LOCK key on my logitech keyboard, and often Captin will freeze and prevent me from typing anything until I hit the CAPS LOCK key on and off multiple times until, I guess, the app "resets." Then it works like a charm. But it happens way, way, way too often. Other than this bug, it's great, and I really need it when working with a keyboard like logitech (which, except for the glaring error of not having a CAPS LOCK indicator, is great).