I bought and used it last fall/winter. I have a hand injury right now or would be doing it right now.
It is a great program (REALLY HARD!) When you start, it is hard, just go at your own pace and you will improve rapidly. It is a wonderful addition to some sort of cardio work. Once you have used it for a while, you will feel like a new person.
I don't do those types of things in the summer cause I'm just too lazy and too busy riding my bike, but the winter time it is a great adjunct to cycling and helps your cycling a lot when you start riding more in the Spring.
The spoke