I stopped using Sensa last winter because I felt I didn't need it any more. Since then I've gained back 5 lbs. but still kept off the bulk of what I'd lost. This is because using the Sensa gave me time to change my eating habits and I'm still eating healthier than I did before Sensa.
It could be better but, then again, it could be a lot worse so I'm still pleased with the results I got from Sensa.