I've been using since August 1. I've lost 38 pounds according to my starting weight, which was an estimate at the time. I do know that I have lost, as all of my pants and skirts fall off of me. I am set at 1570 calories and it's working fabulously for me. My mom is also doing it, with a slower weight loss, but more importantly she had an 80 point drop in her triglycerides on her most recent bloodwork (no other changes to account for the drop).
I *LOVE* it! I use the app on my smartphone.