Since this thread is still alive, I'll re-itterate what I posted earlier and add a little something from my gym conversations. As far as I understand, this exercise isolates the inner tricep head that sits under your armpit and works it in the same fashion as a close grip bench, except your pecs are kind of out of action since your wrists are pronated backwards. Anyways that said when I do it it has a sticking point about 3inches higher than a common bench but you need a spotter to take the bar off and on because its a bear alone if you go with any kind of wieght. You can do more than you think you can, its just in a different place.