Meant for the work / drive (may not always have the phone) I'm wearing the Gear now but throughout the day, with and without a telephone in the vicinity which Gear works without Bluetooth connection (but only time display).
On the technical details I will not go, because already other users described this extensively. Thanks for this have finally convinced me. (Hint: Samsung site with interesting videos and information)
Here is my conclusion:
After the problem-free installation of the software via NFC, you can configure the Gear according to your wishes.
The Gear can be very good wear, battery life on average 3-4 days (have the "wake up" disabled in motion, "On" on keypress) Show / messages of example Whats App, SMS, Email, various chats, among others, even Tagesschau headlines arrive promptly, and can be easily read. If one leaves the Bluetooth range is the message Gear, but books itself again automatically, meanwhile incoming messages are updated. Appointments and contacts to display, SMS short answers can be created and managed just about software.
Another tip: using the free app Watch Tyler can adjust various display to their own taste.
The built-in camera is nice for small Pics, the pedometer also, and the phone works on the Gear, but are not relevant to me.
In short, a handy gadget, about the purpose is debatable ;-) but for gadget fans (like me) a highlight.
The good end: The Gear should not get wet, be careful when washing hands, showering and rain.