Never used it solo CHAPS, but I have used it in conjunction three seperate times with PFull, and have felt it has some added benefit. I feel at least it has the most added benefit on an aesthetic level with muscle belly fullness and a little bit of vascularity. The best dosage I found was 8 caps a day, 4 in the morning, 4 at night on off days. 8 Pre-WO with PFull,CEE, and Caffeine 20-30 minutes Pre-WO