I purchased the Fitbit Surge from Fitbit the first day it was available. It seemed to be the perfect smart watch for me. It checked all the functionality boxes that I wanted and more plus a great heart rate monitor (HRM) that did not require a chest strap.
I am writing to warn you away from this watch if an accurate HRM is one of your requirements. I used it as recommended by Fitbit.
So I wrote the company from their website requesting an authorization to return the device. (I had it for all of 2 days). We are in to 4 days without a response from the company.