All I have to say is WOOSAH!!!!!
I use Billys Bootcamp, I have basic training, ultimate, and the AB. I do the ultimate the most because its a better workout and I sweat like a fiend. This maybe TMI but I sweat so much that when I am done my whole head, and my shirt and shorts are literally soaked, I have sweat dripping of the ends of my hair, I cuss all the way through the AB workout, I always do the whole thing... what I do is if something burns I stop just enough to shout obscenities, then get right back to it lol. I love it.. Gonna take a while to plateau off this I think, though.. I lost my billy bands, I cant find them anywhere.. I have to get some more. Its a work out without the bands.