I have an R56 MCS March 08 build and after 3,500km, so far so good, apart from the mesh screen for the sunroof sliding back a little. No squeaks or rattles or any mechanical or electrical probs. Clutch was slightly smelly while running in, but that has gone now. Gearbox is even sweeter now - smoother changes.
Economy is great when driven for economy, and still pretty good when not ! Enjoying the chassis more and more. Took it down Macquarie Pass, 2hrs south of Sydney, a really twistie downhill road through escarpment forest - handling, grip & steering was just brilliant. That engine is sooo flexible, down or up-changes rarely needed. I can tell you that the ABS certainly works too
I hope it always stays so good......