Phone app is fine, watch app is inexcusably horrendous; GPS locking on the watch is awful, only ever seems to obtain a signal while connected to the phone (which means taking phone on every run to ensure watch tracks your position), otherwise 90% of the time, the watch app shows a colourless GPS logo, therefore unable to even start a tracked activity. TLDR; Other GPS tracking watch apps I have fix a GPS position without issue, Strava is mostly useless without the phone connected.