Barry Jay, Cindy Whitmarsh
This is a set which comes with two dvds and a special extra-long stability ball. I got it second-hand, off e-bay, minus the ball and supplementary materials. I already had a stability ball and did not want another one. I would say there was one move I had to do on the floor due to not having the special extra-long ball, but other than that, I was fine, and they did not even use the ball that much.
The two main workouts are upper body and lower body. Each follows a circuit format, one minute moves alternating strength and cardio. The strength moves are done with a band. There is a countdown timer counting down the time.
I love these workouts. They are short (about 25 minutes) but pack a real punch. I find I can push myself more with this style of training because I know it is only for a minute, and it feels like time goes by quickly. There are a lot of exercises using your own body weight, which really works for me.
There were some bonus add-on workouts which I have not yet tried.
I had great results with this series after only a month and enjoyed it a lot. It will definitely stay in my rotation.
Barry is very drill-sergeant style, which may not work for some people. Cindy is sweet and nice. She does every rep with you and coaches, while Barry shouts and walks around.