I have been running an IS300h for a year and 15000 miles and it is categorically the best "everyday" car I have owned, for my needs. Recent, previous everyday cars include Mercedes, VW, and Audi. Average mpg is 50.2 on petrol which equates to around 55mpg on diesel with the price difference. I agree that the handling is really sharp (Alex Wurz was involved), the build quality is superb (the Audi had more rattles than my Morgan in spite of Ingolstadt's PR smoke and mirrors). Unfortunately, the silence in which the IS covers the ground rather shows up the Achilles heel of the Z !