Their products aren't bad but they're very basic and of questionable quality. Can't knock the brand in general, as for the employees I can say this.
I interviewed for a GNC three years ago. I was told I would get 10 dollars an hour and 20% commission when I sold whatever product was being pumped that month, also I believe 10% on all GNC product sales. Now, you ask yourself "whats a promo product?" Well way it works is a product manufacturer (usually muscletech) pays GNC corp to force their employees to hype their particular product(s). They FIRE YOU if you don't. What this translates to was pretty clear 2 weeks ago when 2 kids came in here wondering what I thought about cell-tech for fat loss. I was in shock, asked them where they got the information and they said a short chinese lady recommended it when they asked for a good THERMOGENIC. She was stupid enough to do this, she could have at least said hydroxycut or something. Apparently 8 scoops a day for 5 days followed by 2 scoops in the morning and 2 scoops after training would help them drop weight like crazy. Pfffft what a joke, I wouldn't be surprised if half the shit they say is actually harmful to many people. I ask all my customers their goals, any health problems I should know about etc and weigh everything before making a recommendation, guess they don't believe in really taking care of anyone but whoever cuts them a check.