I recently got a FitBit One (its a clip on like the zip, but does the sleep recording like the wrist band varieties). It seemed to have better reviews than the wrist band types (namely due to the wristbands breaking, and those also seemed to have more onlineplaints about syncing), so I choose the One and so far its been pretty cool. I just clip it to my bra and it works so much easier than a wristband for me – for one I don’t like the idea of wearing a wristband, and two its much easier for me to keep track of (don’t have to worry about leaving it in my jeans pocket and washing it!). If the sleep info isn’t of interest to you and you want just a really good pedometer then you could get the zip.
I needed something to help keep me motivated and interested, and so far this has! I mainly use the website, as I just find it easier than using an app, and log my food on there as well as see how I’m doing during the day for walking/stairs. The sleep function has been pretty interesting too, and this will give me some info I can pass on to my doc. If you get a One, and forget to tell it your going to sleep/getting up (by pressing the button) then you can adjust it manually when you log in to look at your stats which I like.