Pilates rowing exerciser, help?

Get your tightening, toning and strengthening workouts all with one simple device: the Bally's Pilates Rowing Action Exerciser.

This low-impact, row-action exerciser develops, firms and slims abs, thighs, back and buttocks
Works in one smooth, easy motion
Burns calories
Combines aerobic conditioning and weight training benefits
Includes fitness guide


So I just bought this the other day, have not used it yet. I'm wondering if anyone has used one of these, and how did it work out for you? I also have no idea how I can even go about figuring out calories burned.