Daniela, I first started calorie counting in October using My Fitness Pal. My hope at the time was to concentrate my weight loss efforts and hopefully lose more weight than I was alone with trying to eat better. It worked considerably better than I ever thought it would. Instead of -maybe- losing 6 lbs in 2 months I've lost between 7-10 lbs a month since I started.
I haven't focused much on exercising yet. Because of certain health problems I'm limited in what I can do.
At the moment it's limited to walking with DVD's.