These balls are excellent. They shoot very accurately and consistently. I'd say they were tournament grade paint. The fill is extremely thick and the shells are on the sweet spot. Out of the whole case, non broke anywhere but the person on my sights.
A friend of mine is running a similar setup with a flatline and he says that they are very consistent with those balls. No breakage in his Flatline either.
I used a case in three weekends, which were two weeks apart each. They performed the same in all of them. Just stored them in the closet.
Worth the pretty penny price tag. Get them and you won't regret it.