I'm planning to add it to my exercise throughout the week. I'll probably do it two times a week, I just need something which is challenging and produce good results - plus I love Jillian Michaels, she's pretty inspiring.
BFBM is a great cardio workout! Some of the circuits are really intense, but Jillian does a good job of mixing less intense movements in to give you a little breather.
Have you tried No More Trouble Zones? It's a head-to-toe toning workout that is about 45 minutes (about the same length as BFBM). I found that doing those two DvDs on alternate days gave me great results!
Can I join you too? I have been walking this summer and need to get back into circuit training. I have BFBM and Jillian's Extreme shed and shred, which is two more 45 min workouts. Ilm going to aim for a Monday circuit.