Well well well. Finally got my hands on a copy of this disc!
I must say that I really like it. I have never hard a good bunch of the songs on it before (Nikka Costa, Alex Max Band, Jason Derulo etc.) and I was afraid they would suck, but to my mind, they don't. This is all good pop music! Some hits I didn't have in my collection before, too (Lady Gaga, James Blunt). The mixes range from, uh, reverb in the rears (CCR) to completely off the hook (Fine Young Cannibals). It's true, the FYC track sounds a bit odd at first, but I think it's pretty cool! They really tore that one apart for 5.1.
I find it interesting that the mixes are so uneven. Probably everybody in the production team had a few assigned to them. But here's the thing, guys. Even when the mixes are more subtle, in most cases, there's still discrete rear activity at enough points. All the songs sound great (I would have liked a bit more punch and clarity in "Owner of a lonely heart"), and in almost all cases, the vocals are in the center, which I personally very much like.
Oh yeah, and about that "specifically designed for the Mercedes car" hoo-ha, I don't think it makes that much of a difference. The mixes sound good, period.
So yeah, I guess it's up to anybody to decide for themselves, but for what it's worth, I like this disk. Nice music all throughout, good sound, mostly nice mixes.
EDIT: major credit goes to a fellow QQ member for making it possible for me to obtain a copy of this disc. I love this community.