I have one but have never actually used it. After discovering Cathe, I have decided not to venture out of the Cathe realm because there are certain things I really like about Cathe, as an instructor, that I feel I won't find elsewhere.
However, that being said. I have heard great things about Tracy Anderson - but I have also heard that her workouts are difficult re: the moves, esp. if you have never danced before. But since you have, I would say give it a shot! I think you can rent her DVDs on Amazon for like $2.99 to see if you like it.