Anything will shoot great from these barrels.(unlike the flatlines, you could shoot marbles and they would still chop)
Shoots farther than flatline, not picky on paint, the curves kill people.
None at all.
This barrel is the best thing I have ever used. The flatline can't keep up with these. You can add as little or as much spin on the ball as you want with the flick of a switch. you can launch long shots that curve just a little to get someone out from behind a tree. you can divebomb people hiding behind stumps or bunkers. Or for close range you can turn all effects off and use the barrel just as a standard barrel which is also more accurate than the stock barrel on my pro-carbine. Everything about this barrel is great, I would say that there is nothing this barrel can't do, but nothing is perfect, I just haven't found that thing yet.
Go out and buy one, they are only $50 and can add a whole new level to your game. Plus you don't have to go broke trying to buy paint that will fit them. I give this barrel all the props in the world.