I did disc 2 on Wednesday. I had to drop the weight a little on some of the tricep exercises to keep good form. I felt it the next day, particuarly in my triceps, and am still feeling it a bit today. Yeah!!!
I didn't feel much after disc one....but I think I'm comparing this to my experience with P90X. When I did that, I was starting at ground zero, so my body HURT, every time. That was several years ago, and I'm much stronger now, so it takes more to get to me.
I'm working a long, late Easter weekend, so won't get to do much workout wise. Will do some short cardio tonight, and pick STS up again on Monday.