is this decent home-gym?? i just started working out, but the problem with going to the local gym is that i dont have my own car right now. it's a 30min walk to get there, i dont mind walking but i burn way too many calories considering i have a small appetite. i dont feel i am being time productive doing that (i have tight schedule). should i buy this set for home??? general question: what's the difference between the "bench press" (pulley system) on this set, and the free weight bench press bar.