MS Band
Not the most fashionable design, but MS seem to be taking an interesting route for activity/outdoors stuff with notifications from your phone.
Latest addition to the software is 'Hiking' which neatly changes the 'Running' option to work better with longer duration.
Could do without it nagging me about UV exposure, but I'll get round to turning that off.
As with all these things, there are specific use cases where they're very useful. Just a case of picking the one that suits you.