I have owned the is350 for 14 days approx... Ok it's a fun car to drive, the paddle shifters are a bit slow, faster on the 335i beemer twin turbo. I test drove these vehicles, CTS, ISF, IS350, BMW335i, Audi S4, C 63 AMG. Like them all. Ended up with IS350 and it's a good practical choice. Fuel economy is above average, comfort is good. Fit n finish this car is an excellent value, picked up the 09' for 7k less than asking price, car is fully loaded, plus 3m invisible shield, tint, nav. No question about it, great value, fit n finish is...? Well let's just say it's a Lexus.
Paddle shifter improvement, memory seats, the transmission flutters between 3-4k in third gear, manual setting. Dont know why? It's a bit annoying. It's like the car has a mind of its own... 0-60... Quickly!