Likes: Does much better than other trackers at accurate sleep tracking. I've tried 3 others before this one. This one does not have a separate charger, amen! You can plug it straight into a USB although because of the angle it can be awkward at times to get it all the way engage. You can pick up to 5 sports - I was surprised to see I could pick volleyball - that was a first. This one is much better about staying connected to the app even when my phone picked up another Bluetooth device - like the car. I don't seem to have the same problem with the weather info as others, but I only have phone and text message alerts set up. I don't have it linked into email or any social apps.Dislikes: Sometimes the sedentary alert goes a little crazy - like it will alert for stationary for an hour, when I had just sat down from doing something. Biggest issue is that it will power off from low battery with no warning before it does. It will be at 35% - 40%, one bar, and the next thing I know, it's off and I've missed half a day's worth of steps. It is lasting 2-3 days, but it's still pretty new. I don't like to charge things too often unnecessarily, it wears the battery down faster.Overall very satisfied with the purchase. Would buy another.