I’m a highly skeptical person, so I don’t do anything that gets a weird side effect review and never have done anything invasive. I read the actual science behind this one and it seemed to make a lot of sense. I got four treatments on both abs and butt over two weeks. Nothing hurt, in fact, the butt treatment made my chronic nervy right hip pain go away (something my massage therapist been working on for years!). At first I was wary because the before/after photos on RS didn’t seem that different. Then I realized when I went myself that most of the “afters” are taken at the fourth treatment. However, the full effect is 4-6 weeks AFTER the fourth treatment. My kids are age 14 and 17, so no matter how skinny I’ve gotten over years (due to an illness, I dipped to 10 lbs underweight for a time), I just never achieved that pre-babies pulled-in look despite Pilates etc. It is true that if you are too beyond your ideal weight range, you may not see the results. I’m 45, 5’4 and 123 lbs. so I can see signs of the transformation under that last layer. My butt has started getting a rounded rump look. I’m about 2 weeks from last treatment. I just did a roll-up as core test and it was a total breeze (not the case before, mind you). Stairs are much easier. I feel like this could bring a lot hope to people who are immobile due to age, disability, or recovery. FYI - the thigh and calf versions will be released end of year. Once I get to 6 weeks I’ll post before and afters.