Much like the Apple watch I feel like we're in the infancy of this type of tech and that there's going to be a lot of churn, updates, mid-cycle refreshes, flops, etc. as the kinks get worked out. So after I tried a couple of the more expensive trackers (Fitbit Surge and Garmin Forerunner 235) I backpedaled and went with the much cheaper and simpler Charge HR. It's battery life is good for me (at least 5 days) although not to great for my wife (more like Brent's 3 days) and my hope is that it'll last a year - basically until something much better comes along and convinces me that spending more than ~$100 is worth it.