OK, I'll chime in........Original PM I had is six years old, a Power2Max. It is still in service on my trainer bike. Has worked flawlessly, but not BB compatible with TT bike, so I got a pair of PowerTap P2's. These have been in service four years, but right side crapped out and only have left side, but no big deal. I will say that I don't like their engagement, they are currently on loan to a friend. I'm through my second season with a pair of Favero, which have been excellent both in PM performance and feel. Also lighter than the PowerTap. I just ordered a second set of Faveros for my wife for her to start training with power. Knowing there are replacement parts and serviceable I don't know why anyone wouldn't choose them over the others.
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