Nah, in my opinion you really don't need them! But, I did hear that the one with Billy Blanks smokes the bags off of you. I can't remember what it's called for the life of me. Good luck!
I do Tae Bo Amped and every day the sweat just falls off of me lol. I just bought the Elite Boot Camp series, that's the one he uses when he travels and visits the troops so I can't wait to finish Amped and get started on that one.
The military training DVD with TRX is amazing and has given me a workout to do for the rest of my life. The TRX is an awesome tool that I've been using at home and on the road for over a year now and the product has held up to a lot of use indoors and out.
