Great

I have been using for a couple of years now, I have done the 100 burpees, killer core and I am working on the 100 push up and 25 pull-up workouts. It s a good program at a good price, it will keep you working out for a long time. I do wish it had more advanced exercises like the handstand push up, one arm push up or muscle up. Once you completed level 4 there is not much else to do. However I do like it a lot.

Aurez about Gorilla Workout: Build Muscle, v5.1.1