The new IS looks so much better. The old car had a lovely, low-slung profile, which is basically unchanged in the new car. But the bits where the IS wasn't particularly convincing - headlights, grille, guards front and rear - are now rather more so.
The engineers kindly pushed the wheels out further to widen the car's stance and the designers made the absolute most of that by really chunking up the front guards and sending the rear guards to one of those gyms where the guys struggle to get through the door without going sideways.
The new headlights have a much cleaner look and now integrate the LED daytime running lights. The full width effect of the tail-lights accentuates the extra width of the car and now it looks properly sporty, even in entry-level Luxury specification. The only thing letting it down is meek looking alloy wheels.
The cabin is pretty much the same as the old car, which is a double-edged sword. It's beautifully built, full of lovely materials, and it's a nice place to be but there's no real innovation. Well, I say there's no innovation - the new 10.3-inch touchscreen looks terrific and does help bring the cabin further towards 2020 while making the Lexus signature analogue clock look ever more naff, but you learn to ignore that.