I use to want them. But for all the issues people had. I figured crank based PM's were a better bet. And they are much less expensive. Though I also realize that most complaining were probably a very small minority.

I also thought that it'd be nice to be able to swap them from bike to bike. But also realized it'd still be too much trouble. And I could get two crank based PMs for the price of one pedal PM. At least back 5 years ago I could.