Never owned the CO2 versions, but I owned a regular PCP version of the TalonSS, no huge issues with them that I know of. The only real issue/non-issue that I'm aware of with the CO2 versions is that the power adjuster doesn't make a huge difference in power range. The Condor will give you slightly more power on CO2 because it has a 24" barrel compared to the Talon with an 18" barrel and the SS with a 12" barrel, but then all of the barrels are interchangeable with every frame version. I don't know if you've found it yet or not, but there is Talonairgun.com with loads of Air Force gun info. As Gene said I used to make some wood for those guns, and spent a fair amount of time tweaking these guns, they can be a bunch of fun.