GNC's got this stuff on sale right now, saw it in the store but wanted to look it up, see if anybody's got any experience with it before I buy. It's called NxLabs™ MASS SYSTEM™

It's a couple products boxed with a book, supposedly a 21 day mass building system. GNC's got it on their website, not sure how to link to it on here.

Not too hard on the wallet, if it's good stuff at all. Anybody tried it?