I lost the weight. I paid the fees. Now, though, at weigh-out, the app and the interface don't work. I have had to go through support to get my weight verified, AND they've only done it for some of the games. I ONLY knew of this "flaw" because the same thing happened last week, so I lost my money.
IF you're willing to contact support every time you need something and IF you can manage to find their email, then it's worth it. I WILL NOT ever be associated with this again as they make it impossible to collect when you win. I WILL get my money because I refuse to be a victim a second time, but unless you're willing to cause a scene, you won't see your money back.
Bottom Line: No, I would not recommend this to a friend