At present, I'm only weight training my upper body and using Cardio Coach for cardio and to lean-out my lower body. In the future I will re-integrate lower body weight work but, for now, this system is really working for me. I will say that I used to rely a lot on GSL and B&G. GSL has great calf work (B&G doesn't) and B&G hits the outsides of your thighs (firewalkers, anyone?) in a way GSL doesn't do quite as well). I must say, though, B&G feels like a never-ending marathon if you do the whole thing. I have S&L Legs but had eliminated lower body weight training before I got it so I still haven't tried it. In the end, though, Catherine is right. Nothing impacts results like really cleaning up your diet.
I'm thinking I'll return to lower body weight training when I get STS, which I plan to do by-the-book. After all this time, it should really put the SHOCK into Shock Training System!