I was going to purchase a Fitbit Surge with heart rate monitor (250.00) wanted something that keeps a better HR while working out in gym then ding a light came on why not pay another 150.00 for the same feature plus all the benefits the AW has to offer to my daily life. The. I been hearing since update that not the HR feature is messed up on AW and doesn't work accurately is this correct? My main reason to purchase this is to use in gym and monitor my activities and use watch without pulling out phone so I'm hoping both options are working properly.