The only issue with the Magic Rack is that it is too consistent.
Only my home table, and oversized 8ft, I used a fine sharpie to mark the foot spot and then I put a perfectly square line from there toward the bottom rail (far enough to see when the balls are racked).
This lets me rack in the exact same position and perfectly square each time.
I can make the wing ball EVERY time with a medium controlled stroke and control the cue ball and one ball most of the time... and the 9ball usually stays within the rack, unless kicked... not many golden breaks.
A slightly different stroke is needed on a 9 foot... a little harder in my experience, but I can get nearly the same results, with a little less control.
Some might think this is a flaw, but I like taking as much luck as possible out of pool.
If pros were to use it on normal tables (not 4" ones like they did), they would be running a lot of racks, IMO. I'd think alternate brake would be needed in that case.