it will help if your acne is not real severe. in my case i used it and it helped for 3 months and then stopped working. the renewing cleanser may be good for you if you just have surface acne on your back since it's kinda gritty and exfoliates and also has benzoylperoxide in it. maybe just try the cleanser by itself. personally i think the stuff is not strong enough to spend the money on it and you could get a better prescription bp wash cheaper if you have insurance. Ask doc about Benzac.
Either this or Proactiv should help a little at least for a while but don't expect it to be a permanent solution.