I have owned my car since the end of 2005 brand new and this is my 3rd Lexus, I previously owned the RX models and never had any problems with them at all, I traded in one of them with over 100k miles on it without a problem. This car has had nothing but problem after problem, from new headers to timing chains, to leaking sunroof. The dealer does fix the problem and keep it to make sure the problem is resolved, yet if feels like after I get it back something else breaks or stops working. I really hope Lexus steps up and changes things or else I may be looking elsewhere for a new vehicle.
It is a solid car and love the little things like the push button start, the backup camera, the ipod connection.
Reliability which is what they are suppose to be all about. More leg room in the back and easier access to the trunk as you can't fit much back there.