its very stable and works fine
now i tried on vista x64 and it wont work at all
i can edit my levels over the cuemix software and can select the asio outputs of my motu device in cubase 4 but when i play anything in cubase, it will not play it in my soundcard output

i remember to the creativelabs x-fi drivers with 4gig problem
the eax features in the first creative x-fi drivers for xp x64 driver was not working for 4gig ram
i was able to workaround with boot.ini "maxmem" parameter to bring xp64 to 3gig ram and it worked fine
now creative has fixed his drivers for x64 with 4gig ram and it works!
i think its the same prob here at motu x64 with 4gig @ vista (remember - at xp64 it works fine for me)