I did three easter trainings with ambit and gps pod. Comparison of elevation profiles here (red=baro):
https://lh4.googleusercontent.com/-KC63QgeZYUk/UVv...
Climb reported by movescount: baro - gps
43m - 51m
135m - 141m
137m - 129m
Gps pods elevation values and profiles are pretty good. And a lot lot better than values from AP's elevation correction plugin, DEM it uses is prety poor aoround here.