I have to say that i don't actually own the gun. A friend of mine does. However i've tried it myself several times mostly attracted by its looks.
The gun works fine until you try to upgrade it, we bought a response trigger which actually messed up the, if you can believe it, PLASTIC cyclone feeder. We never suspected that to be the problem so we bought an E-grip to replace the supposedly problematic response trigger. When that didn't work, we dissasembled the gun and found out that it was the plastic cyclone thingy that caused the gun not to fire any rounds since nothing was actuall was fed into it. So we bought an aluminium cyclone thingy and the gun worked fine for a day or two. Then it just stopped shooting again. So we sent it to the Tippman service guy who has the gun for 2 months now and still hasn't found what's wrong with it.
Bottom line, I have to admit that it worked when unmodified but as soon as the "infinite mods", as advertized by tippman, took place all hell broke loose.
Buy the gun but don't try any mods on it, except if the mods are on its looks.