I had auto light on the last car and wouldn't be without them now, just so convenient. One thing I've noticed over the years is that, if you override them when you deem it necessary, they will "learn" from your inputs and adjust their sensitivity.
Auto wipers are new to me on this car (old one had auto lights only, before rain sensors were available on the A3) and so far I'm not too sure about them - they seem very erratic, sometimes wiping the screen in the timely fashion and sometimes leaving it a bit too late for comfort. Can't help feel that, as the actual sensor is fairly small in area, it's down to luck how much water happens to fall on the sensor area at any given time.