for the last few weeks, i have been looking for info on the new (well newer) USP. pbreview was a great help, and here is my opinion on the USP. I have recently been considering buying a USP as a secondary, and I'm glad i got to try one before i bought one of my own.
i have not really played with pistols much, so trying to aim with it was tricky. i found myself having trouble aiming it because it was so much different than my semi. the pistol shoots surprisingly straight however, with no curve in the shot for well over 100 ft. this pistol is also very sturdy. when you grab it, its not heavy, but you can definately feel that the gun is durable.
the lever on the co2 knob is handy, giving you lots of needed leverage so you dont lose much air from the 12 gram. i found that i could get a consistant 15-20 shots out of a 12 gram shooting at about 250 fps.
reloading the gun is interesting too. PMI has a good magazine design ( much better than that of the zues) with a sliding piece to cover where you load the balls. i found that if you put your finger in the groove when the gun is tipped back, the paint balls load much quicker and easier.
this gun also makes you much more aware of your game too. ie. you dont want to advance too far without being sure your magazine is full. i speak from experience, it really sucks when you go storming into a room with three opponants when you only have two shots left in the magazine :(
I would recommend this gun to any body that already ownes or has owned a pistol, and for all you semi owners, definately try this gun out before you buy it. i would say that this is the best pistol i have ever shot for its decent gas efficiency, amazing accuracy, and excellent design.