I say give it a try...the only things IMO that youll waste is money and time.

If you want to lose a few pounds and tone your upper body look into actual exercises and not a quick gimmick that you hold while it shkes. I prefer weights but you can do it with bands or body weight alone. Heck a pair of $15 push up bars can work wonders for your shoulders/chest/triceps in a few short weeks if you haven't been doing many in the past (I'd suggest sets of regular pushups, wide, narrow, decline, shoulder, dive bomber, etc....you could do sets of each to failure in less than 20 minutes every third day or so....heck your first go round may take closer to 10 minutes)