Now the wiper itself: In contrast to the joint wipers Bosch (which I find for under all) the Aerotwin are really top notch! Now, after 3 years of service life (I ride daily about 110km 1/3 city, highway 1/3 1/3 motorway at about 150 km / h max) it is no longer reasonable to begin to wipe. I have to say, so long a wiper has never held. Therefore, its price is also more than justified, especially when one considers that the wipers wipe equally well at any speed. Even at speeds of 180 km / h, and a light drizzle, where even give up the standard moderate joint wiper, wiper that has a result 1a. I can recommend it absolutely!