[Samsung Galaxy Gear] BarryH_GEG:
You have to think of Android Wear devices as "Nexi." They are the wearables equivalent of AOSP meaning they're all functionally the same. Everything they do (so far) is tied to Google Services which is great if you're "all in" with Google as the main provider for what you do on your phone. The Tizen Gear's are a better choice if you are more dependent on some of the Samsung apps and services. Android Wear is really just Google Now on your wrist. At least as it currently stands. And once a notification is dismissed it's gone which, based on how I use my current Gear, wouldn't thrill me.

The watch starts off dark (and dims after 5 seconds; this is immutable for now). To wake up the always-on display, you can press the lock button, twist your wrist (and wait a beat or two), or tap the display. If notifications await you, they show up in card form, which you can swipe away to dismiss or swipe up to expand. Swiping to the left reveals finger-friendly icons for making the next move, like opening the notification in your phone or launching into navigation.

You can swipe down from the top to view the date and your battery life meter, or mute and unmute the phone. A long press calls up wallpaper motifs, most of which Google supplied, though a few are Samsung's own. Holding on the lock button invokes the Settings and its various options.

Still, most of what you do on the Gear Live you do with your voice: setting alarms and reminders, navigating, and composing a text message or email to contacts. Samsung, by the way, has splashed out with adding its own stopwatch interface in addition to Google's. You can ask to see your heart rate, which triggers the monitor to do its thing; you can likewise demand to see how many steps you've taken.

Notification displays come in the form of miniaturized Google Now cards and pass along information like stocks, weather, sports scores, and social interactions. You can also control a music player and field phone calls. Notifications are larger and easier to read than notifications seen on Samsung's other wearables, but this is more controlled by Google than by Samsung, whose customized contributions are heavily curtailed with Android Wear.

Google's voice-driven interface has its ups and downs: we did manage to execute several voice commands, including sending short texts and email messages. But, one drawback popped up immediately: you can't approve or abort a message if Google's voice engine misinterprets you, or if you change your mind. Grammarians also won't like the usual issues that come with voice transcription -- mainly irregular capitalization and punctuation you have to voice yourself.

Android Wear is meant to be always-on: in the default mode, the Samsung Gear Live (and LG G Watch) have displays that are bright and colorful, but power down into dimmer, black and white displays that always stay lit to some small degree. As a result, our early impression on battery life isn't good. We got less than 24 hours of use on a full charge. Making the screen go fully dark after a few seconds should help, but then you'd need to wake it up to see the time or do anything else. Battery life seems like it could be a major drawback on the first generation of Android Wear watches.​

http://www.cnet.com/products/samsung-gear-live/