Bob,
I'm still trying to figure out power meter on the bike. It looks like you have gone the pedal route. What are your thoughts about loosing the float and walkability of the Frogs?
I get the trying to figure it out part; I waffled and hemmed and hawed for month last winter reading every article and trying several different routes.
The big barrier for me was cost and compatibility with short cranks, q-rings, and the current V20/S30 clamping system. In the end pedal based (PowerTap P1, BrimBrothers, and Vector) where the most compatible and P1's the least problematic. The float in the P1's has been sufficient to protect my knees; if I needed more I would have gone BrimBrothers and SpeedPlay Zeros'.... While I an advocate for Frogs for beginners and all things non-competitive; I don't find them well suited for competitive stuff where you have to really lay into the pedals over and over for sustained periods; that's asking more than the pedals was designed for; single track and down hill MTB is a vastly different sport...
So in the end buyers remorse (yes I do get that, contrary to the myth), lasted about 2 outdoor rides and after that I couldn't be happier with the choice for them on the road. I still have somethings to sort out for the trainer side if I want to use them indoors for consistency there are some ANT+ /BT issues because they are new tech and the TR update with the new BT stack isn't out yet.
When the new clamping system (described at the retreat) ships on future bikes people will have more options to use 30mm spindles which come in short crank version and power meters etc. That will allow single bike people to get a great crank and meter for $700 total; until then and for those with the existing frame or more than 1 bike, I think the P1's are the best choice with the exception being the price tag if you use sub 165 mm cranks; if you use 165mm or longer then stages is the option which saves $400 but gives some trade offs.
Walkability on Keno cleats is the least offensive of the road type so that's been ok; it does appear that we'll burn thorough 2-4 cleats in a season at $9 a pop to replace; could be worst.