Woo this is a workout! I used heavier weights. I have been doing bottoms up on and off since the 90s always with great results. I have been back doing it since Jan 2016 again with great results. Definition has a bit higher ratings and since I really love Bottoms up I decided to try this one out and bought it used on amazon for something like a total $8 and that was including shipping. Book was in excellent condition. It is pretty much the same as bottoms up even the pictures are the same but it has a different set up for reps which I actually find made me sweat more and work a bit harder. I like it. I look forward to seeing more changes. I would have been disappointed that it is so similar to bottoms up if I had paid a lot- but I didn't. Glad I got it

Edited to add-- it took me 40 mins to do the entire upper body workout- that is including wonder woman and dragon lady. Also I am skeptical of how many calories JOyce says you burn in 15 mins. She says 210- I will have to wear my heart monitor to truly judge next time. Either way I do feel worked out