I started my pump career with a CCI phantom. It was a great introduction to pump play but once I discovered snipers, it was all over. I've had some pretty awesome snipers so far. It started with the Creamsicle S5, then a dust white S6, then a Camo S6 which was traded for my current T2.
I am kind of torn between my preferred T2 setup. On one hand I really like having the option of shooting a lot of paint very fast. My 48/4500 tank with a modified sportshot is perfect for those days. The sportshot always keeps balls in the stack no matter how fast I auto-trigger and the 48 ci tank let's me shoot as much as I want without having to worry about air.
On the other hand, I really like how light the T2 can be setup. With a 22 ci tank, I can still shoot a decent amount of paint but with half the weight of the 48ci tank. I pair that setup with a 50 rd winchester hopper and the setup doesn't slow me down at all. I have to be a little more careful with my shots and when playing against semi's it doesn't give me as much freedom to keep players in with a relatively steady stream...I have to be a little more conservative...but man is it light!
Anyway, those are basically the two ways I run my T2. After having it for a few months I've definitely noticed some things about it.
It's not particularly pretty. I just doesn't compare to the Creamsicle S5 or the Camo S6 but those were very limited run anno jobs and some of the most beautiful markers I've ever seen. Still, the T2 just isn't a "Sexy" gun. It's a bunch of tubes at right angles, that's it.
But it's the plain simplicity that makes the T2 light, a feature that I definitely appreciate. There's also the efficiency. Tests have been done and I don't know what the final verdict is, but whatever CCM did in this round of design makes for a very efficient gun. I haven't taken the time to do the tests but I am pretty sure you can get 400 shots off of a 22/3000 tank which should be plenty for most, especially if fills are readily available.
Another thing that I've noticed is that the T2 definitely requires regular attention. I wouldn't go so far as to call it fickle, but it's a finely tuned machine and things can go awry if you don't give the gun proper attention. The half-block design does allow for grime and paint to directly attack the bolt, something that one needs to be conscious of if playing in the woods where dirt and splatter abound or on the speedball field where getting peppered at 13 bps could end up with a nasty gun shot. I experienced first hand what happens when you get shell and paint in the lower tube...shot velocity drops significantly and there's really no on-field fix.
Some comparisons with the S6.
I find the pump stroke on an S6 (or J2L) to be just a little smoother than the T2. The T2 is almost "mechanical" perhaps due to the dual pump arms sliding through the guides on the body.
I think the full body sniper designs are a little more robust in general. The back block can't unthread itself, the lower internals are completely enclosed, etc.
The lack of backblock on the T2 however provides the option for a really tight setup if that's what you are looking for.
Overall, the T2 is an excellent machine and I can't say enough nice things about the people at CCM. They stand behind their product 100%. They play paintball and they know the in's and out's of their markers.