The flat is every bit as clean and stylish as the photos show - the bathroom particularly is huge with a large bath and plenty of space. The flat is very conveniently located less than 5 mins from Keperplatz and Reumannplatz stations on the U1 metro line, making it very easy to get to from the airport as well as into town.
Michael himself was very helpful, giving us local tips about which Christmas markets to go to and making suggestions regarding what we might like based on our interests. He waited for us in the evening despite our delayed flight.
I would definitely recommend staying here!