I received my GG2 as a gift, and otherwise would not have spent more than say, $100 on such a device.
It worked well for about 4 months, then my IP67 certified device got wet, and water got inside. After taking it apart and drying it out, the only thing that doesn't work now, is the touch-screen. So yeah: IP67 is bullshit. The degree of immersion was; momentary immersion under maybe 6" of water.
As for the other uses:
Battery life was good, about 3 days.
Charging was awkward, with a little clip-on connector that goes to USB. (Qi charging seems like a no-brainer for a device like this!)
Integration with my Samsung Galaxy S5 was JUST OKAY.
I liked having the time on my wrist (duh).
It was convenient to get my notifications, but I STILL had to dig my phone out of my pocket to send a reply text.
The bluetooth/phone conversation feature, I thought was kind of neat. I never could get used to conversing on a bluetooth earpiece, but being able to have the watch in front of me with a visual indicator that I was in an active phone conversation, really helped. It was kind of geeky, kind of neat, and worked pretty well in most situations, unless it was a private conversation you didn't want on-speaker, or there was too much ambient noise.
Samsung's TIZEN OS is very limiting, with regard to apps.
Contrary to the documentation, I was able to use Google Hangouts as my default messenger app on the phone, and still get notifications. (documentation really wanted me to use the Samsung messenger app - which sucks ass, by the way).
Of all the watch-face selections available, there was one that had the time AND weather on it - which I found very handy, but it was MADDENING that there was not a watch face that could devote a couple dozen square mm to "notifications".
The audio notification, and vibration, were weak enough that they were OFTEN missed in outdoors/noisy situations - (like driving with the windows down, or at outdoor events, etc). This is why you need to at least have some kind of on-screen notification indicator.
The thing has a camera, and video camera. Just plain unnecessary. Why no LED for handy flashlight? The camera was difficult to use due to it's positioning, and not really good enough to take worthwhile shots. Also, it had a very loud "shutter-click" sound, that could not be disabled. I found it annoying. But I guess that someone trying to take "creeper-shots" would probably not be able to get away with it because of that sound.
In my opinion it was stylish enough. Not oversized. So I wasn't embarrassed wearing it at all. (these companies designing "round" smartwatches, are just barking up the wrong tree, I think).
Fitness: Has all the nice GPS/Pedometer/heartrate sensors. They integrate okay with Samsung's SHealth. Not great, and not without problems. Unfortunately, heartrate data does not show up on the graph. You can get max rate, and avg rate; and there's even a line for it on the graph. But the data field is "--". Boggles my mind why Samsung won't integrate this on their own fucking device.
The use-case for this seems like a great idea, but not well-executed. I really look forward to the time where these wearable sensors can not only get your heart rate, but also detect arrythmias, and blood-oxygen levels. (theoretically - this sensor can do that. But Samsung's firmware isn't smart enough yet).
I thought it was also pretty stupid that the watch couldn't track a walk or hike unless the phone was in bluetooth range. So I had to carry the phone with me anyway. The ONLY advantage the watch gave, was continuous heartrate monitoring; and as I said: the continuous data gets discarded and you only get the avg and max. STUPID STUPID STUPID.
Sometimes, on runs or hikes, the watch would just freeze, and I'd lose all the data from that hike.
If I went in and "started" a run or hike on the watch, I would go into the phone and "start" that too. So I would have a backup of the data if the watch froze. SHealth would then record that I took TWO separate hikes at the same time. Yes; sometimes the numbers didn't agree (distance, speed, steps, etc) - but they were always reasonably close to each other.
I think that most of these kinds of problems just trace back to Samsung's Tizen idiocy. I *do* like the fact that it had a 3-day battery life. But if running Android instead, meant that it had a 1-day life, but that the fitness app functionality actually worked, then I would much rather have that option.
Now that it's dead - I *do* miss it. It is still in-warranty, but the warranty explicitly "does not cover water damage" - (yes: even though it is IP67 certified!). I decided to send it back to Korea, see what they do - will they repair it? (they need to replace the digitizer, and that's not trivial, because it's pretty much glued-in to the top half of the case). If they charge me for the repair, it's going to be less than $100, or I'll just tell them to shove it up their asses.
OH - but this article was about Apple's new device!
Okay -so, I am generally a big fan of Mac computers. Not really a fan of iPad, or iPhones. (tried both).
Given a comparison of the GG2 to this Apple device, I can say: whole lotta "meh". I think it's nice that they didn't try to cram a camera into the Apple watch - but it's still $350, innit? Too damn much. The only redeeming feature is the Qi charging. And I suppose it's attractive enough. But 1 day battery life? And requires an iPhone? Forget it.