This was my husband's first fitness tracker, and when looking for a new watch, my husband decided to try this as a replacement watch with the combined benefit of a fitness tracker.Battery life has been about 1 week between charges, which are a breeze because he can just drop the watch on top of the wireless disc charger that he normally uses for our phones. It charges up in about 20-30 minutes.It tracks his steps and his sleep, gives him the current air temperature wherever he is, and since he synced with his phone, he likes the email and text message notifications. You can answer calls with it but need to use the phone to speak and hear the caller. You can NOT make calls with it or write email or text messages with it. You can REJECT calls with it.The phone app provides historical data on steps, workouts, sleep, heart rate, etc. He has found the sleep data to be interesting! He likes the way he has it set up to change from daylight to nighttime mode for easy visibility. It is comfortable on his wrist - not sweaty or irritating.He has NOT worn it in the shower due to a warning against exposing it to extremely hot water, but in theory, one could wear it in the shower, swimming, in the rain, boating, etc. The glass is very scratch-resistant too! Overall, this was a great entry-level fitness tracker watch and does what it needs to do.