Rolf and Cabs
Here is my experience with Rolf and cabs:
I arrived yesterday to Munich and Rolf was waiting for me in the airport as we had arranged by email. I emailed him only a few days in advance and got lucky that he was available. He charged me 40 Euros to go to my hotel, the Sheraton. When I asked him about getting from Harms back to the airport he said a regular taxi would probably be 50-60 Euros but he would do it for me for 40 Euros. It then turned out that he was not available so I asked Harms to call me a cab. The fare on the meter was exactly 40 Euros. Harms did not mention any flat rate fare of 32 Euros but I also did not know to ask because I'm reading this while I'm back at the airport waiting to return home.