Any feedback on the perfect push up (http://www.everythingfitness.com/tr-ex-21.html) before I drop $40? I've got a bad elbow which hurts when I do any chest exercises, think this will help?

just do it normally. get a elbow brace if its bad. i don't see how a handle thats going to rotate while you put pressure on it is gonna reduce the pressure unless it has a latch that holds the specific pose in place.

it looks pretty cool, i was considering it. Im not sure how it would work wwith your elbow, its probably more unstable if anything, although the rotation might be a more comfortable position. maybe order it and try it out and if no good return it.