The 2008 BMW 6-Series is actually four cars: the 650i convertible and coupe, and the M6 convertible and coupe. They share a profile, 2+2 seating, and impressive performance, as well as hefty curb weights and a heavy feel at the controls.
To TheCarConnection.com, the 6-Series still seems squat and thick, especially at the rear end. Edmunds says it has a "great personality." Cars.com says it has a "humplike trunk." Car and Driver says it has "unique looks." Slight updates this year left the 6-Series "essentially unchanged," according to Road & Track. M6 coupes get a carbon-fiber roof, while convertibles and coupes get a deep front air dam, says Cars.com says.
Inside the BMW 6-Series, the story is a little less controversial. Car and Driver says updates here are "barely worth noting." Consumer Guide says the cockpit has an "elegance", and Edmunds agrees, though it says the "elegantly crafted" interior has an "austere feel."