in my opinion, the pros outweigh the cons. if you not willing or dont have the time to make your own routine then WBB has some good ones. the pros are that you definetly gain muscle. also muscles most people disregard are included in these routines. while ive been on the routine the biggest of my gains is in my shoulders. while the least of my gains is in my gut. The only thing id add to WBB #2 is some trap work, another day of abs, and a few more heavy sets in legs.