I have a pair. I also have some One UP components flats and to be honest, can’t tell much of a difference in efficiency or stickiness because my foot doesn’t slip off of either pedal. It’s nice to have the huge platform but I also get more pedal strikes while pedaling out of a corner while still somewhat leaned over. They are really heavy which is another downside.
All and all, I’m glad I have them because they are reasonably priced, have a lot of surface area, and look nice. But I don’t think they are the miracle pedals that the marketing makes them out to be.