They have been making the Ct200 since 2009 and calling it a Prius so the technology is tried and tested. Driving a CT200 is not the same as anything I have ever driven except for my wifes Prius and by that yardstick it is an improvement. Casting aside badge loyalty, its the best automatic economy hybrid car I have come across.
I have bought a CT200 because I wanted one. If I wanted something faster I wouldnt have bought it. My 38 mile drive to work is along the A1234 from Little Boring to Greater Yawning which is a tedious 40 mph road because lorries use it and there is very little opportunity to overtake. Diesel cars just get sooted up, petrol cars drink the fuel, a hybrid is in its element. The road is smooth and so harsh suspension means very little, there are very few corner which one could describe as challenging so handling isnt a consideration, its just nicer to travel in a Lexus than a Toyota or a Honda.
If I were to be commuting on my old route which was 95% motorway over 50 miles then perhaps an IS would be the way to go, however, I preferred to rough it with an Audi A4 diesel.Horses for courses.