I had one for a while, passed it on to
@jeremywork earlier this year (or maybe late last year?) to go with his collection of PC cards. The note in the review about it only working with AFE is not strictly speaking true, though may have been at time of launch; as
@jeremywork pointed out in his great taxonomy of PC cards, several of those also had an external port for this drive so one could use 5.25" floppies on the PC side.
It's a very simple peripheral, basically a standard PC drive in an Apple-branded enclosure. I think even the pinout is compatible with the old IBM PC external floppy drives (though I only did a very cursory investigation of that which I now only half-remember). I never had the SE card, but the NuBus card has a startlingly high number of components for what is presumably just a PC floppy drive controller on a board, which makes me wonder if it has other tricks up its sleeve on the hardware level that never surfaced as software.
But perhaps it was just designed by someone who was having too much fun.