So I've had it for about two weeks now, but I'm leaning towards selling / returning it.
Don't get me wrong. I like it. The problem is, I already have a Fitbit One and a Nike Fuelband. I'm not getting enough unique functionality to justify it, and both the Fuelband and Fitbit have features the Band doesn't.
People talk about it being uncomfortable, but they're mostly comparing it to the thin, stretchy devices like the Fitbit Flex. Compared to other rigid trackers - like the Fuelband - it's not all that different. However, they're right that it's hideous. It's big, bulky, and unsightly, whether you wear it face in or face out. So that's not ideal.
From a functionality standpoint, I do like the features. The heart rate sensing generally works well, the GPS is pretty accurate, the step counting is as good as you can expect for a wrist-worn device - any wrist worn tracker records phantom steps that my waist-clipped Fitbit doesn't. I'm not terribly concerned about the smartwatch features, but they do work as well as expected - and it was fun seeing the look of confusion on the Starbucks employee's face when I stuck my wrist under the scanner.
That said, the software needs a lot of work. For starters, it needs an easier way to view past data - I'm not just interested in the past week. Also, one thing completely missing is any sort of social aspect. My favorite part of the Fuelband is competition among friends, which it lacks entirely. Fitbit is incorporating more of that lately, too.
Battery life for me ranged between 1.5 days and 3 days. Good for a smartwatch, but pretty bad for a fitness tracker. I thought the Fuelband was bad because it needs a charge every 4-5 days.
Overall, there's a lot of good ideas here. If I didn't already have two other trackers, I'd be very happy with the Band. At this point, though, it doesn't offer enough to get me to REPLACE one of those, which is what it ultimately would need to do. I can justify two...but I really can't have three! In typical MS fashion, I'm sure version two will be not far behind, and will smooth out a lot of the rough edges. I'll revisit it then.