Since purchase it has been a blast to drive. Hopeful the balanced engine translates into long life as that is the only way I am every going to get my money out it! '03+ S55 probably faster due to supercharger, but I could not stand to even think what a supercharger would cost down the line. Really enjoy the machine, great ride/fast ride. I confide I still don't feel like I "fit in" an S55 but hopeful my ego will catch up with the wheels.
Of all the luxury sedans I've owned, this one is the best. Overall, nothing can touch it. Performance, features, and even price (based on everything you get) is superb. This won't be my last S class AMG car.