Inside, the 2012 IS 350 and IS 250 models are true luxury sedans in that they come with leather upholstery, top-notch materials, and a long list of standard features, even in base versions. But as with most compact sport sedans in this class, there's quite a bit of tire thrum and road coarseness.
Front seats are well contoured and firmly padded, but backseat space is tight. Rear seats are cramped and short on headroom and legroom both. Don't plan on having adults ride back there—even across town—if you want to keep business relationships.