I've driven the 2011 A4 for 4,000 kms now, in a variety of weather and road conditions.
Top marks so far for the very peppy turbo 2.0L engine, the solid but not harsh ride, quiet interior, roomy trunk, confident handling from twisty roads and sharp corners, and an entertainment system that is a match to any desktop computer.
Medium marks to the odd LED daytime running lights that wink out when a turn signal is on, the turbo lag off the line, a slightly choppy 8 speed auto transmission that isn't as silky as it should be, and back seats that aren't quite roomy enough for the legs of taller adults.
Room for improvement on head space for the driver. I'm only 5'10", but my head nearly touches the roof liner, and I can feel the top hairs on my head brushing against it in a weird kind of way. The sunroof pushes that space down a bit. I could adjust the seat down, but then I feel like I'm too low down for the most comfortable position.
The media controls and Nav take a little while to get used to but become intuitive. Checking out the screen options can be a bit distracting. Voice command and Bluetooth phone work very well.
This is a high tech vehicle that has a lot of hidden features and options, which can be adjusted or customized off a screen menu. The amount of info on the computer displays is remarkable, and it can even play movie DVDs to the driver on the same display (when not moving, other it's just sound).
This car will be a delight to techie people who want a sporty ride with lots of comfort, pep and torque, without the high cost of big horsepower, many choices of entertainment for long drives (radio, CD, DVD, two SD card slots, downloadable 40Mb memory drive, iPod/iPhone hookup, sat radio), a beautiful Nav display (3D, 2D, night/day, quickly zooms in and out). Rear camera, lots of remote sensors for passing and you've got one high tech ride. And a classic elegant design.
Pretty good value featurewise against Mercedes and BMW, and hopefully as well built as Lexus.