I am now on day 5, day F-I-V-E and have lost 3 inches!! I haven't kept track of lbs because I am not overweight, but do need to "re-firm" my prob areas after last baby. I combine this with my regular cardio every morning! I have found myself wanting to hurry and get my 45 min of elliptical or tae bo over with so I can do this. It is VERY challenging but fun! It goes by soooo fast! I am still on level one, but that should tell you something...I work out no less than four days a week for an hour each time. I work out hard, break a sweat everyday and push myself...now that I have began the 30 day shred I feel my health and workouts have improved x's 10! I plan on doing level one for 10 days, 2 for 10, and so on. Great buy, great workout!I gave it a four because if you have any knee issue you have to be careful about your form, but J points that out.