I am by no means a super-advanced exerciser and I find these tapes superb. Cathe's great form pointers make these tapes easy to catch on to even for someone who's never done weight training before. Although you can do these tapes using only a variety of dumbells (I personally have 5, 8, 10, 12, 15 lb dumbells, but use mostly the 8-10's for these tapes)there are a few exercises Cathe uses a barbell for. I purchased a barbell about 3 months ago and really get a much better workout for those few exercises (back exercises, some chest and some bicep work)that Cathe uses the barbell for. But, if you dont own a barbell, dont let that discourage you because I did these tapes and got results long before I owned a barbell.
Hope that helps,
Stacy