the apartment is easy to reach by train from the airport and same easy to get anywhere in the city center by tram. We picked up the keys from the neighbour as Erwin was traveling himself, but he was still very quickly ansering all our questions (special thanx for the hair dryer, btw!).
And the bed is very comfy! it was like hugging us after long days of walking :)
would absolutely recommend this app. for couples or group of friends, as someone have already said before!