I did Insanity for a few days and found that it surprisingly left me full of energy and I was not so tired afterwards that I couldn't go do 15 minutes of strength training - and I gave it all my 270 pounds!
Only problem I had was my knee. I caused some strain which really reared its ugly head on the core stretching day. Twice I went through without a problem until that day and my knee gave out both times so I stopped it until I could lose a lot more weight and take the strain off of my knees.
Honestly, I really enjoyed Insanity while I was able to do it every day. I drank the energy drink they recommended during the exercises so I could keep going and lost an inch off my waist in the 3 days I was able to go go go.
| current weight: 275.0