I've been using the watch with my international Galaxy Note for a couple days now with great success. It's actually more handy than I thought it would be, but I do have some reservations.
First, I really wish there was a way for new emails / SMS messages to popup with the content of the message when first received. What it currently does when a SMS or email is received is vibrate, and then show the SMS or Gmail icon on the watch instead of showing the actual message. This means you have to double tap the screen and swipe the time away to actually see your new message. I have used the WIMM ONE, which just vibrates and shows the message as soon as it receives it, and it's much preferable. I would probably keep using the WIMM, except it doesn't provide email updates, and is ALWAYS disconnecting itself from my Note.
Second, I can't seem to get my google calendar to sync with the watch's calendar app, even though I've specified it in the settings. Any suggestions ya'll can lend would be appreciated. Otherwise this is a great little tool.