My wipers work well at clearing the screen when they choose to operate. Worst experience so far was driving at 50mph in heavy rain at night when suddenly the rain became ‘monsoon’. I gave the voice command ‘increase wipers’ and the car responded with ‘wipers off’. Finding the hazard light switch in a hurry in the dark is almost impossible. It was a miracle I didn’t go off the road and no one ran into the back of me whilst I got them going again. In retrospect I should have just kept my finger on the washer button but it was a panic situation! Think about what you would do. Looking at the touch screen is not an option!
Best trick for wipers is to push the stalk button once and that makes the wiper options pop up. You don't need to hunt through the menus to find wiper settings.