I bought Insanity Fast and Furious about a week and a half ago. Tried it for the first time tonight. To my understanding, this workout is basically supposed to be a quick 20 minute substitute for days that you can't do a full hour of the normal Insanity workouts.
I was under the impression that I would be working out for a full 20 minutes. Not the case. It has the same format as the normal Insanity DVDs. It starts with a 10 minute long warm up and stretch (I expected a more intense warm up - not the case). You then work out for 8 minutes, followed by another stretch. An 8 minute workout??? I barely broke a sweat and didn't even need to take a sip of water. What a disappointment. I was really looking forward to this, too.