I have one of the very first RX40hs off the line. I waited a year an a half on a waiting list to ensure I got the first one to arrive. Unfortunately, I think I have a lemon. The car pulls to one side and after a year and a half and 25,000 miles it cannot be fixed. Tires were bald at 15,000 miles, and the dealer replaced all four gratis (which was nice of them). The dealer has been good. But Lexus corporate has pretty much ignored me and does not call when they say they will, if at all. I am extremely disappointed. Lexus customer care does not care, it seems. All they do is send surveys, but it seems they never read them.
Gas mileage, comfort, room, reliable other than poor tracking problem.