I have all the firm dvds. The wave is by far my least favorite. I found the wave to be cheaply made and I didnt feel as if I was getting a challenging workout. Most of the firm dvds imo are good to great so you really cant go wrong with them however the wave imo is a waste of money.
Of all the firm dvds the best is the original that was made back in 1989 the lead was Susan Harris.
I also enjoy the dvds that Alli leads.