I've been using it the past 2 days, my wife got me hooked on it. She's trying to lose weight and i'm trying to maintain my weight. I've found out that I don't eat nearly enough. I need 2550 calories each day due to my active lifestyle. I've only been eating 1100.
I've learned a great deal about food using this app. Yesterday I had a peanut butter and jelly sandwich (300 calories) and was hungry after I ate it, so i'm finding other foods that offer much more food for the same amount of calories and they end up being healthier foods. So the pieces of the puzzle are coming together.
Another example, I was getting my car washed and they have complimentary fountain drinks. I had 4 cups of brisk raspberry iced tea which was roughly 400 calories and the sugar made me tired after, now that i know that i tend to stay away from those drinks.
I'm beginning to see the benefit of eating healthy and watching calorie intake, as long as you dont cheat yourself with it and have much self control it'll work for you and it's nothing to poo-ha-ha.