That's very encouraging. I love the feeling of being sore, it's instant feedback that I am working hard. I was worried about the space issue, I don't have a ton of room to run around here so that's also good to know I don't need a ton of space. The thing I didn't like about the P90X is that I didn't have the room for it, and I had to constantly pause the DVD so I could set up the cords in the door jam, or get the resistance bands set up. The reason I love yoga so much is because it's just using my body weight, I think that's why Insanity has already intrigued me.
Thanks for the info, I think this might be my new goal post Thanksgiving.
Good, I hope you do it and look forward to your thoughts. Honestly, if you are doing it alone your living room would be more than enough space I would bet. You are mostly moving in place. I tried P90x, but for the reasons you described I never finished it. I hated having to setup that stuff