I bought it, it just came a couple days ago. I did Viper last night and the workout was awesome. I love it. I have a major complaint though.... I was constantly switching up my space. Low step, high step, move the step to use the weights, add weight, lower weight, move the step back ....
My workout space is small so I can only have so much out and readily available at once. I don't think there is a good solution for me, maybe just being more ready.. knowing what to expect and having everything ready. It doesn't help with moving the step in and out though. I never preview workouts, although I know I should. Mytime is so limited I would rather use the time to workout than to sit and watch. :-(