I am so sick of people moaning that this product doesn't work (whilst they sit there eating pizza, and cream cakes and watching TV!!). If you have alot of body fat on your tummy, this definately won't work simply beacuse even though the muscles are toning, there is so much fat that you won't be able to see them!! The best way to acheive flat abs is to have a healthy, calorie controlled diet/lifestyle and use this product to compliment your fitness program. I put on about 5 stone whilst pregnant (yikes!!) and once I'd given birth was horrified by my appearance. I set about losing it through healthy eating- lots of fruit, veg and low fat food and after alot of hard work and exercise, I lost the all of the weight. However, despite regular sit ups, my tum was not as toned as I would have liked so I purchased the belt. I am very very pleased with the results, however, it must be in conjunction with a healthy diet and you must use it regularly. A bit like the gym, I found that it only works if you use it at least 3 times a week. Having said all that, I have now acheived a moderate "4 pack" on my tummy which for me, after having a 9lb baby is nothing short of a miracle!!! Definately recommend this product but you must also pay attention to your diet too.