 I'm coming up on a year with the Q5.  I love the ride, it sits well, and handles well in the snow.  Unfortunately, the MMI system that controls the navigation and entertainment is TERRIBLE!!!!!  It is not intuitive, it is both on the steering wheel (IF you can figure out which dial to roll) and has a small joystick on the console.  It is way too confusing, too distracting, there is no touch screen and overtime I try to use it I get frustrated.  The book doesn't help at all because a lot of things aren't in there or aren't explained clearly.  The system is so bad that it colors my entire feelings about the car.