I personally use a Garmin Fenix (an old one, Fenix 3). The watch form factor is perfect for my use cases (mainly hiking, running and ski mountaineering). Also:

I personally use a Garmin Fenix (an old one, Fenix 3). The watch form factor is perfect for my use cases (mainly hiking, running and ski mountaineering). Also: the barometric altimeter is a must have for mountaineering purposes. I guess it very much depends on what you need it for.