Raising the Barre

It seems that the ballet inspired barre workout is the new fad.  I tried a few barre classes last spring and enjoyed it, but wasn't quite convinced.  Since I'm at home on maternity leave right now I can't go try a class at a studio, but I found one on demand on Direct TV.  I tried it while baby slept yesterday, and OWIE, I'm sore today!  As a former dancer I thought that this would be a piece of cake.  While it technically wasn't difficult, it was a killer workout!  In fact, I didn't even make it through the entire 35 minute video.  (That could also have to do with the fact that I haven't done extreme exercising in a few months.)  It did wonders on my glutes and core.  I'm definitely going to be investing in some barre classes around the city and maybe even some barre exercise videos.  Has anyone else tried any barre classes?