Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

I'm using the CycleOps Magneto [Cycleops] curve now as it was recently updated from the beta version. The only difference is that the Watts at higher speeds look to follow the Cycleops published curve better. (I have the Magneto which is the same as the road curve on the Supermagneto.).

I'm using the 'Interval' setting. Seems to be easier to follow intervals that way. Virtual power over estimates power below 200watts. But then my turbo work is all interval work. So its not an important area. Long efforts will be done outside with the powercal. I get the impression the powercal is better for longer less varible efforts anyway.

http://blog.trainerroad.com/cycleops-supermagneto-pro-added/