My old one was the first one we got many years ago. It wasn’t holding a charge very well anymore. This one takes a battery, which is much better for me since I suck at remembering to charge devices. It doesn’t have sleep tracking, but I never really used that anyway. It also syncs with a scale and a food tracking app I use (LoseIt). Overall, I love it!
If you don’t have a Fitbit and you are curious about how many steps you take and more…I highly recommend this!