I just got my 3 pack in the mail and so far, I did part of the Interval cardio and the Step one this morning. I'm going to do the Sculpting one in the AM. I really like her personality and the workouts are pretty good too. They are not terribly complex, but interesting enough to keep you from being bored. The step workout has "Party Intervals". Of course, it's not Imax tough but I got a really good workout with both of the cardio's so far. Katina is very likable and I think she teaches pretty well. The production quality is pretty good, music is not bad and the set is nice.
http://www.stepparty.com/partystore.html
http://www.stepparty.com/partystore.html