I would be interested! I have done step -- or perhaps attempted? -- for a few years and I usually have difficulty because I am trying to mirror the tv and we turn to the back of the room. But I am a bit of a spaz . . . :D
PHA3 is tough! I have to admit that I haven't been able to do both sections on the same day yet (well I did start this after vacation ;)). I love it and can't wait to add the Ab Stackers.