I've been using JT Maxim SP Scenario Paint (About $32 a case when you buy 4 from ansgear.com) After about 2 cases I have zero breaks with mostly fulll auto firing, and very consistent ball flight
Awesome Distance, super Accurate, no paint breaks, VERY flat trajectory, cool looks.
Must keep gun flat, no shroud options, difficult to mount some larger rail accessories.
After reading a lot of the reviews on here, I had almost resolved myself to buying an APEX 2 without having tried it. I went to the field, crono'ed to about 275 (280 was field max) and played woodsball all day. Without going through the extended testing process a lot of reviewers recomended, shots were very accurate, and WOW the flatline made an immediate difference on velocity at distance, and long range shooting. Super flat trajectory, no strays, I could reach players with flat shots while they couldn't reach me arching it(I got some serious long range tags all day because they just couldn't get in range without being lit up). It doesn't have the adjustments of the Apex, but I seriously don't see the side shots, low shot etc being useful on the field. I think because the Flatline uses a curve to impart spin, and the Apex only imparts spin at the end of the barrel("Shocking" the ball) you'd be easier on paint, have less brakes and have more consistency from shot to shot. In woodsball, this thing can give you an advantage over the egos, etc. Yes, they can shoot 20+ BPS, but they can only shoot so far. I'd never get a Tippmann without a flatline, and wonder when they'll start coming up with this for speedball guns, so back players can use them.
Canting the gun will lead to some weird flight paths, just like with the Apex. The spin on the ball that makes it go farther will make it curve turned even a little bit to the side. Cool looking shroud, but no options to change it(an M4 stylle would have fit my gun really well). Included shroud can make fitting some accessories tricky, but if you remove and reinstall it they should fit.
I would very highly recomend this over any straight barrel; the only reason I would recomend someone should buy the Apex over this is that it is a little cheaper, and that you can get some different shrouds for the Apex. After my experience with this, I'll be getting one for my GF's A-5 when I pick it up. 9 because of the lack of other shrouds, and bc shroud rails are too close to the shroud to fit some accesories without adapters.