I have a Galaxy Gear (1st generation). When I got it I thought the dialer and speakerphone would be more useful, but they aren't in reality. The most useful feature is getting notifications from the phone without having to reach into my pocket. My wife uses her Galaxy Gear to take lots of pictures (especially when pictures or videos aren't allowed).
Thanks, it's true, very useful when your phone is in your pocket and you can't get to it easily
What kind of notifications do you think are most useful? Like location bases alerts, maybe ifttt-like alerts, sports...?
I think the most mundane ones are the most useful. Just seeing the subject of an email or a text message that comes in is enough for me do decide if I need to get the phone out and reply or take some other action.