I have a Hotrod SE. For now a Kingwin PS/2 to USB adapter serves my purpose as I don't fire mame up very much to be bothered by the occasional miss. Eventually I would like to replace the encoder with something like this or the IPAC. What I would really want though is something that can handle the two sticks + buttons AND a trackball and/or spinner. I do not currently have either, but eventually. I probably can't fit both in the Hotrod casing though.