The S90's riding quality is where it truly shines. Few rivals at this price point can match the air suspension, which is standard on higher model levels and absorbs road imperfections with a tranquillity. It just irons out the road without any drama; it doesn't float or crash. A driving experience that feels premium in the purest sense, not loud, not aggressive, but incredibly well-composed and is enhanced by the cabin's superb sound insulation and ability to remain extremely silent even at high speeds.