I have a Fitbit Flex bracelet (not the Force) - wore it for awhile and now it sits in desk drawer. It did track my sleep but was not what I wanted on my wrist all the time, felt uncomfortable and was not attractive looking with other jewelery. The ads say it downloads automatically when you are by computer but you have to activiate the download. I went back to wearing my old fashioned pedometer. I might have liked it better if I had bought the Fitbit One at least I would have had the option of wearing hidden instead of on my wrist.