Hi gurus, Im going to start running (lightly!) again. I've got an Apple Watch, but I'm liking the look of the Forerunner 15, for its real time speed/distance/elevation info. I've not used the Watch's Activities (or whatever it's called) app, so was wondering if I should use the Watch or get the Garmin? http://www.amazon.co.uk/Garmin-Forerunner-Running-Activity-Tracker/dp/B00JRXDCCE/ref=dp_ob_title_ce Cheers.