I love 'em and I don't think they get enough appreciation. It wasn't that long ago that 2x2 and 2x3 were ordinary print sizes; photo albums from a couple of generations ago are routinely full of contact prints in those sizes. I sort of like playing with the "looks like an old photo" reaction that people have to small prints; I've got photos from the last couple of years that people routinely assume must be preserved from the 1950s.
This whole business with ridiculous gigantic print sizes like 4x6" will blow over eventually, just you watch. :-)