This apartment is rented out by a company called Veo Apartments not by Markus directly. I dealt with a different person from the agency each time I made enquiries about check in time and had to sign a separate contract with Veo Apartments when I collected the keys - which I was not told about when I made the booking.
The apartment had an issue with bad drain smells coming from the sink and the manager replied saying they would take a look after I had checked out, which was not helpful.
The property was also noisy, any sound from the neighbours is clearly audible.