If you just want big pecs, why do this stupid exercise? It looks unsafe, doesn't focus attention on the pecs, forces you to stabilize and activate a bunch of smaller muscles...
I guess if you're a gymnast it makes sense. If not, just another fad exercise from all the T-Nation contributors who spend too much time foam rolling and not enough time getting big.
Just do some pushups if you're hard up. Why do you need $500 in equipment to do a pushup now?