I have only had this car for a week now but I love it so far. It has amazing power and is really comfortable and classy. I am the third owner and it seems to have been pretty reliable for the other owners, although I don't have all the maintenance records. The only "problems" thus far are the left side of the digital display in the dash is dim and I've had the lamp malfunction warning come on once.
Power, power, power. Did I mention the power. I love its understated styling. Only those who know and see the E55 AMG badge on the back know what it is.
Cup holder is terrible, but it's better than the wannabe cup holders in the w126.