I've owned BMW, Lexus, Jags, Porsche and this is my third Mercedes. This summer I sold my 2007 CLS 550. I loved the CLS with a few exceptions. The trunk was too small and I could never figure out how to change the clock (I'm pretty computer savvy). The 2010 S 550 is very different. The trunk is huge ( a lot of room for a golf bag). The Command controller is the silver round nob you see in the photos on the console ( I call it the joy stick) and if you fiddle with it for about an hour you can work almost everything in this car. Changing the clock takes about 20 seconds. The S 550 is beautiful, functional and comfortable in every way. How could it be any better? I can not wait to see the new MB.