Useful watch, especially as it also does heart rate and blood pressure. It is a bit too thick to wear to bed, so sleep measuring is not a feature I use, but your mileage may vary. However, the bluetooth earpieces, which are the main reason for me buying this watch, have one issue that you should be aware of. They only work properly if the device that you are using it with (phone or laptop) is in front of you directly. If the device (phone) is in a pocket on one side of the body (such as a trouser pocket), then only the ear piece on that side will work. Likewise, if the device is in a bag on your back, the signal to one or both of the ear pieces keeps cutting out. The phone needs to be in front of you and ideally not move or change distance between the earpieces. Other than this observation, a very useful watch to have.
love this watch