This thread has piqued my interest. It seems that at least a few here (eg. Floridamtb finds his altimeter has overreported elevation by 400%?) think that the barometeric altimeters in garmin units don't work? I generally at least see my start and stop elevation (ie. at home) tend to be pretty close (ie. Elev Gain = Elev Loss).
So.. what's the best way to capture the most accurate elevation stats.. with our without elevation correction? If using elevation correction and if data is sent to Strava (from Garmin connect).. is Garmin or Strava's correction better? fwiw i'm using an Edge 520.