I bought this car new and have not had one mechanical problem (except the radio antenna replacement at 100,000 miles) thus far. The car still drives like a new Lexus, such a smooth ride at so many miles. Luxury and comfort--- I'm keeping this car as long as it allows me. No problems with convertible top to date. Had to replacement rear seat cupholder one time. Very flimsy.
The smooth, luxurious ride, of course, and the sound system rocks!
Sturdier backseat cupholders. Oh, the removable convertible cover (stylish when on) is a pain to remove, put on, and store when not in use.