Just my opinion, but I am betting you would not like some of these classes. All of the yoga I have done in studios has been Hatha/Kripalu style yoga. I got some DVDs that are more Vinyasa style and all I can say is that I am glad I didn't pay for a series of classes like this. At one point, when I was taking a lot of classes at my last gym and later at a yoga studio, I felt pretty proficient, strong and I really liked the poses. They helped my back and they helped me relax. The Vinyasa yoga is very fast and just didn't seem to meet my needs.
That's not saying you won't like it, but I found it to be very different.