I have a 1212M PCI (original version) running with Patchmix on Windows 7 64-bit without problems. I recently upgraded another PC to Windows 8 (legally for $14.99!) and find it much quicker and cleaner (the open-source Classic Shell deals with the whole Start screen interface issue quite nicely).
So I'm thinking of upgrading my 1212M-equipped machine to Win8 while the cheap upgrade price is active ($39 for a win7 machine bought before June 2). I've looked around the net and haven't seen anything definitive about Win8 compatibility for PCI versions. Anyone with experience? Does Patchmix work ok? I know there are no official drivers to come, but I've also seen it said around that Win7 drivers work fine with Win8.