A prominent central console clearly establishes the driver and front-passenger zones. The controls wrap around the driver with every gauge and switch within easy scrutiny or close reach. The Optitron gauges are large and easy to read, and their light-saber indicator needles and dynamic redline indication are cool modern. The keyless entry and pushbutton ignition is handy.

Leather upholstery comes standard on the IS 250 and IS 350 with metallic accents appropriately placed around the cabin. The IS 250 AWD comes with perforated leather trim and beautifully crafted bird's-eye maple accents. Each piece is hewn from a single chunk of wood to ensure a perfect match from panel to panel.

The heated and ventilated front seats are a must-have. They come standard on IS 250 AWD and are available on the other models. Once you've tried these seats, there's no going back.

The climate control system features a sophisticated temperature calculation system called Neural-Net, a humidity sensor, a micro dust and pollen filler and, in IS 350, a smog sensor that detects excessive hydrocarbons and automatically reverts to a special recirculation mode until the atmosphere clears.