I use the CompIIIs in USPSA competition, I reload so I made my own snap caps, but I caution that if you are prone to mixups, the AZooms are worth the $25 versus shooting your wall or worse.
I have a couple GPs, with thousands of rounds through them and zero issues whatsoever. I did replace the front sights with the Millet Orange Bar, its a 7 second switch that makes a world of difference. Check out Midway USA, they are about $11.