Anytime I can work up a serious sweat and pack an effective toning and cardio routine into 50 minutes spent in my living room before the kids wake up is grand.
I work out at a fairly high intensity most days of the week, and this kicked my butt. I loved it. I'm pretty new to kettlebells, but Bob has got me working and I'm hoping to see results soon. I've been pretty sore after these workouts, but in that I-worked-really-hard kind of way, not the injured sort of say.
Oh, and if you like workouts with elaborate sets and stick figures in matching hot pink workout ensembles bopping along to club music, then this is not the exercise DVD for you. If you like to work hard, get a good sweat going and move on with the rest of your day, then you'll love this.
I HIGHLY recommend you consider purchasing one of his contoured kettlebells as well. Cleans and presses have never been so comfortable. And like Bob says, don't be afraid of the heavier weights!