EDIT: My original review was from February 22nd, but I charged the device on February 20th. It's now March 1st. I got bored with having a low battery so I started charging it at 13%. I've been using it for fitness tracking, sleep tracking, reading notifications, checking the weather, and checking the time. I probably activate my watch about 20 times a day. I wore it at all times, including showering and bathing. I turned off the lift-to-wake gesture and set the screen brightness to 4 out of 10 because it's bright enough for everything except direct sunlight. In other words it's lasted for 10 days, and I imagine would last for 12 or 13 days if I tried. So the battery life being better than Samsung states is quite real!I'm not sure why the battery life isn't marketed more heavily. They should be tooting their trumpets about this all around the world. Nobody else even tries to have this amount of battery life. I dimmed the screen, made sure the BPM counter wasn't on the front clock face, and turned off gestures. As a result I spent only 1% in a day! I spent more the next day, but I have a feeling I could beat Samsung's guidance and make this thing last 10 days instead of 5 or 6. Rare to see battery life HIGHER than the manufacturer's promise.I wanted a smartwatch which I could use for basic tracking and manually looking at my notifications when I felt like it, something that wouldn't nag me. And I also hate how even the Apple Watch gives you a day or two. So when I learned about the battery life, I assumed that it would be $300. Instead it's $60 on Amazon. Whoa. Instabuy, for me.Also, special shout-out to the stress tracker and calorie tracker's accuracy (at least for me) and the sleep tracker being pretty much perfect. There's no "Set it and forget it", there's just "forget it". Everything is automatic and I'm left wondering how other companies are unable to use the standard watch sensors to track this kind of information. Does Samsung have patents on using this equipment in these ways? Regardless, this is one of the most insightful trackers I've ever seen, and the battery life, just wow.A final note: It looks like the silver model is basically sold out until the end of time. I can't find any of them anywhere. I thought it looked prettier and I wanted one, but I settled on the black. I think the black actually wound up being beautiful. It gently reflects a soft bit of light off the band, so it's never really black, it's a darkened version of the color of your environment. Phone cameras don't pick that up very well, so even the official and review pictures show this Darth Vader-esque pitch black band. That's not at all how it is. It's soft and tasteful and I think fashion-conscious buyers shouldn't shy away. At least try the black. :)I've tried a lot of products and this is the closest I've got to "just rate it 5 stars and move on". There's no obvious dings for me. Maybe if you have uncorrected vision and need to buy some glasses, the font could be a little small. A professional reviewer said that you'd be "scrolling and scrolling" to read notifications. That wasn't my experience at all. The font is the exact same as these trackers I've seen at some restaurants and theme parks when you have to wait to be called, and it fits a surprising amount of legible words on it for such a tiny screen. So at least try the font before you assume it'll be too small, I was warned it would be small and I didn't think so at all.