I highly recommend STS. I used it to get in shape for my wedding in 4/2011. I got so many compliments on my shapely toned figure. My father in law told my husband to start lifting so he could catch up. So he did STS and lost 30 lbs.
Let me just say that all three of my sisters were envious when they saw me in my bikini camping at Lake Powell 2 weeks later.
STS is well worth the investment.