I had a great experience in Berlin. Marls’ apartment is a really nice place to stay. She gave me all the information I needed (how to get to the apartment, how to check in, where should I leave my luggage, etc) and answered to my messages quickly. The place is right to the exit of the metro station, the neighborhood is quiet, you have pubs and marketplaces nearby.
Although in the description there is no mention of wi-fi you have a connection but is very weak and only one person at a time can access it. The apartment is bigger than shown in the photos.
Overall it was a pleasant stay in Marls’ apartment.