I got one of these in Black for Christmas and I absolutely love it. It's comfortable and waterproof so I don't have to take it off when I shower or swim like I did with my jawbone up (which actually, literally fell apart after 11 months) . Today is March 27th and my battery is still at 100% which is AMAZING!! My Jawbone had to be charged every 10 days so this is really amazing and I love love love that the batteries can be changed and there's an indicator right in the app telling you how much juice you've got left so there's no wondering. There are no buttons to push, you just give it a little tap and the indicator light will tell you how your progress is going (red, yellow or green) it's got a sleep tracker that automatically tracks your sleep and it's super simple to set your wake up alarm and then you shut it off with two little taps. You track an activity by giving it three taps and if you're inactive for too long you can set a reminder to get up and move. My absolute favorite feature of this though is it notifies me if I'm away from my phone and it rings, get a text or even a FB messenger message and you set all of these through the app and you can set the color of your indicator light. This is great because it seems my son only ever calls me when I leave my phone in the other room -_- There are a ton of different apps you can use along with this and so far I am really in love with this little activity tracker.