Interesting experience. Not going full out, it felt quite good. The most noticeable difference is that when it hit the ground I still had loads of time to work. Being that I was the more experienced grappler both times I had two and a half minutes of smothering someone. The amount of energy they expended trying to escape was huge. Because I didn't need to rush to catch a submission I could relax, keep composed and tire them out. I did 2x5 with two different opponents. Next week I might do three.