I just started working out on my metolius rock rings this week and they are incredible. I'm normally in the gym training 5 days a week, but when I'm to busy I have resorted to using my roommates metolius wood grip hangboard. The rock rings are far better in my opinion. I believe they work you harder and I know they are easier on my shoulders. anyone who doesnt always have time to hit the gym but wants a good pump should definitely invest in the metolius rock rings. SOLID PRODUCT!