I just bought an ASAT 3D Leafy Suit and my wife STILL hasn't seen it, so it must blend in well w/ any environment. All kidding aside, it's really like all other hunting gear. Try it, and if it works for you, great! If you find yourself getting busted, poor quality of the garment, etc., then you know you made a bad choice.
Generally I don't buy any product unless I'm very sure I'll be happy with it. I generally don't have to take anything back because of this. I don't like wasting my money when I don't have to.
Though I have yet to be pulled into the "dark side" of ASAT users I've heard many many good things about the product. From what I've heard, seen, and read over the past couple years it seems that ASAT is second to none. I personally am planning to buy some not this season, but next season to try out. My only doubt is that I live and hunt in Washington and I hunt mostly from pine trees. Though it's said that it blends in with any environment I don't see how a tan/black/brown suit is going to blend in with a sold green tree. I think you'd be making a wise purchase by going with ASAT.