A bunch of my friends think that for Angle Zero you need a stooge to put a corner somewhere for you. Is it true? I don't think so but i'm not sure
Absolutely no stooges, very little setup, very simple handling, quick and to the point, and doesn't leave room for any questions. The reactions are great, this is a high impact trick, not for the faint of heart ;-)
In short, buy it, even if costs 300$, it'll still be worth the money... I simply love this effect.