I've done B&G 3 times now...all of it as it! The first time I had DOMS in places I don't usually get DOMS. I find the sequencing and fast pace of this workout doably challenging. The floor work is very HARD to me. The second time I did it, minor DOMS and this last time I did it no DOMS. This third time I was ready to quit but just kept on going and once I start the ab/core work I don't find it hard to complete (well it's hard, but not hard as in la, la, la, I'm bored, when is this going to be over...). This is fast becoming my favorite lower body/abs/core workout. The two ab/core sections on B&G are my favorite surpassing even my newest favorite which was Core Strength and Conditioning (Tracey Staehele). It is very easy to shoreten these workouts....lots of options. Really, I know, no one can tell, but I could go on and on about B&G...perfection!!!