I actually have had greater success with Ultra H.O.T than Rebound XT. I have been on it for about 3 weeks and have been making steady progress in the weight room, faster than I would w/out it. RXT has it's place too, but if you can afford it i'd say try the H.O.T and run it for 4-6 weeks at 4 caps/day, so roughly 2 bottles for 4 weeks are needed. Deck out about 70 bucks (+ shipping) and your set... that's the only draw-back, for the price, RXT seems better. But for results, HOT seems better IMO.