Yeah, shop there...but ONLY during the 1-7th days of the month, where I get my 20% discount.
The stuff there isn't THAT expensive. I got a 42 pack of Myoplex for like 65 bucks. I checked on the internet, and it was like...59 at most sites, not including shipping and handling, which would probably even the cost. Add to that the fact that I don't have to wait a week for my product, and GNC doesn't seem so bad.