So what makes a paintball good? First, the thickness of the shell has to be thin enough to break on impact but not in your barrel. Second, the fill must be bright so you know when you hit another player.Evil Paintballs are top of the line paint that many tournament teams use. The shell has a perfect thickness and the fill is super bright. Once you nail a player with Evil there is no mistake about it. If you are serious about paintball you better use Evil because you can bet that the other team is!