Rob
I own a 2008 GS450h, to date I've never had an issue with it. The car has just over 70K. My only advise is to let Lexus do all servicing/MOT & repairs as not many independents will touch a Lexus hybrid. Don't let this worry you, Lexus don't try to rip people off over pricing & customer service is second to none. Last thing, I've driven this car all over Europe especially during the winter, never have I've driven a better car. I'd go for a GS over a CT any day of the week.