Got a Garmin Instinct and so far no issues. Stairs is a bit of a nightmare compared to the previous vivosport but who cares 
looking into a running foot pod for cadence or a chest HRM. Ideally chest HRM to give me running cadence outdoors and HRM for Zwift on treadmill.
seen the Wahoo Tickr X but this is no longer made/sold in UK.
anyone have any recommendations?