I hate my '08 wipers. While my sensor does work, I hate that I can't leave it in "auto" mode like I could on my Audi. Audi has a positive dial setting for auto and you can just leave it on. With BMW, you MUST re-engage every time you start the car. Why the extra step?
Also, what gives with the rear wiper?? If you push the stalk back to engage the wiper, she runs, but again, if you turn off the car, and restart with the stalk still in the "on" position, the rear wiper doesn't re-engage, you seem to have to again pull it forward and then push it back. WTF?