"I have them both and love them both. There's more variety on the Gym Styles and the GS are a 2 day split for upper body, but I get an incredible burn with pyramids."
I agree. The pyramids give me a totally different workout than the GS, but I love the GS for the variety and different focus the muscles get. I tend to burn more with the pyramids though. I think it's worth getting the pyramids. It's my personal favorite upperbody weight workout.
Lisa