I tried it five or six years ago and did not like it at all. In fact, I think I used one of the tapes one time and did not even try the other one. IIRC, it was a lot of isometric type of exercises and for a few of them you really needed a barre to do them properly. For me personally, unless I'm moving fast or lifting weights and sweating, I don't feel like I'm getting any exercise at all and this just didn't cut it for me.
MissL