I have a 55 reg LS430 which I will be selling now after 2 happy years of driving. My thoughts Fast, luxurious, spacious, super quiet, relaxing. I came from a 2011 BMW 5 series touring and I wasn't sad when I bought the Lexus. The Lexus was faster and quieter than the BMW. The only compromise was av. 45mpg in the BMW and av. 25mpg in the Lexus. It was more smiles in the Lexus [emoji16] Can't comment on the GS