This is my first pistol, I only bought it as a backup marker for my spyder fenix. However, the holster I bought (32 degrees) didnt hold up well on my leg when running. It did hold the gun very well though.
I decided to take the pistol out as my main marker a couple times instead of dealing with it as a backup that would keep falling off. It was surprisingly accurate, allowing me to peg a guy lying down in the mask at 50 ft with 3 shots. It was, obviously, incredibly outclassed by all the semi-autos, but with some good camo and sneaking around you can get some good shots off.
The main problem I found with this gun was the crossthreading on the CO2 cover. It wouldnt come off easily when in the field, sometimes not at all. I got a replacement, however, and everything went smoothly after that.
Overall I consider this a great backup gun, and an acceptable main gun if you're looking for a challenge.
You could, I suppose. the only problem would be that to change the magazine or air on one would require you to drop the second, which would make it dirty. Also, for that kind of money you might as well buy a semi-auto. My Spyder Fenix only cost 250, and its a pretty sweet setup, even stock.
P.S. I do think that the crossthreading is a fluke. I looked on the cap and noticed that the O-ring was torn up for some reason. I changed and oiled it, and now it works fine.