My wife and I purchased the M7 model almost two weeks ago. We have been using it every day, however since we are so out of shape we are starting out slow and only doing a 7 minute session and add time as we feel fit. Just using the 7 minute session we have lost weight, but we have changed our diet as well. You cannot lose weight by exercise alone. I am hoping to move up to the 14 minute session within three weeks, if not four. I use the app and love the fact that it shows my progress daily. My Calories Burned increases daily and that pumps me up. Seeing my improvement makes me want to do more and more each time.
The assembly of this unit is very easy. I currently came off a surgery for a broken collar bone (still had the staples in) and built it by myself in an hour and a half. The instructions are very well laid out. The nuts, bolts and washers are well labeled in the packaging.
I would highly recommend this product to anyone. But remember if you do not change your diet it will be hard to lose the weight.
Bottom Line: Yes, I would recommend this to a friend