These are improved versions of the original Penthouse Flats. Like its predecessor, the pedal body is huge and spins on EN24T steel axles with ultra high quality bushings. But that's where the similarity ends.
Gone is the old flat body, and in its place is this new concave pedal with a parallelogram shape to accommodate the new pin system that uses 16 bolts (they screw in from the opposite side of the pedal). The pedal has a deep feel and envelops your foot, and the pins offer amazing vice-like grip, especially when hooked up with FiveTen shoes, although they make a real mess of your legs if you do manage to slip.
I removed a few pins to get the optimum grip while still being able to move my feet around, and I love them. Lesser pedals literally disintegrate in the slop, but the Penthouse Flats absolutely love it. Recommended.