The problem with the magic rack is that it loads the corner balls and make the corner ball banks stone dead and nearly unmissable. It was discovered in the European championship (which used a tapped table, which does the same thing). People were purposfully playing for corner banks rather than breakshots if they got even slightly out of line. You can also play other kinds of dead balls in the rack, which are even more productive and condusive to spreading the balls out. It's completely detrimental to the game, like the super soft break in 9 ball. Also, the magic rack can get in the way, if you like to break softly and it remains under the balls in whats left of the stack. I never use the magic rack for straight pool, and I don't think I'd want to play in a tournament that does so.