Personally, I am even sceptical of some of the actual power meter's ability to produce good power figures, not without reason, doesn't take much research to find lots of information about how unreliable many of them can be, they are most certainly not a fit and forget bit of kit. I am hoping to buy one in the near future (probably power2max or Quarq) and am currently doing a lot of reading and tbh, it almost seems like if you can't afford SRM you just buy anything else you can afford and then hope you get a good one, so what hope in hell does some algorithm have in getting it right if the equipment you would use to validate the algorithm is so sketchy.
Most pro's are running SRM PM's, the problems many people experience probably won't bother a pro, because their team will have a load of them and will have engineers to calibrate them and will get faults repaired quick sticks, but for a part timer, it seems you are not alone if you only have the PM on your bike 80% of the time of ownership.
I am aware I may be over egging some of the issues with PM's here, but they are definitely not on the same level of buy it, fit it, use it and blindly accept what it is telling you as you might hope!
