no big problems that i faced as i tried software. merely some weird blu ray disc resume errors, which i think is may be more down to the disc itself.
passthrough hd audio works flawlessly. which didn't on arsoft tmt 5. tmt5 and 6 both have fatal issues with playback of certain discs. windvd can't fathom 7970 at all.
i haven't gotten around to using all features just yet, but from what i've seen great work cyberlink team.
here's a ringing endorsement from a happy/ proud owner.
thanks!