I have the PM version with snaps. Kind of annoying-- one of the shoes has a slightly fatter, shorter strap, and the other has a longer and thinner strap. I don't think I've ever used the red socks in the 12+ years I've had this set.
I like this set, though, because the other socks (the white ones) are quite versatile, and the mary janes are better than the cheap plastic ones Molly comes with.
My girls: PM Felicity, PM Kirsten, Samantha, Rebecca, PM Molly, Jess, Mara (#8), Shannon (#15), Marjorie (#20), Margie (#21), Dawn (#27)