I got my wife's Fitbit surge when she got a new one. It is suprisingly good at what it does but rather ugly. It does all you will need and seeing your heart rate is rather neat but if I was buying new I would get the one she has the Fitbit ionic, it actually looks good and still does all you need. One of the features I like is the plotting of our walks so you can see your route on a map after the watch has synced with your iPad or laptop.
I don't wear mine all the time which sort of defeats the object as I still prefer a normal watch but I suppose there is nothing wrong with wearing both.