I lost 4 pounds in 10 days. I am watching what I eat, exercising, etc. I have a Fitbit and if it quits syncing with your computer there is a way to reset the device & re-sync. I love it as it lets me track my exercise at 3 different levels, # of steps I take, calories, burned, the food I eat with calories, fat, etc. If I find I have not burned enough calories for the day I just march in place briskly while I watch TV & then go check how I have done.