I stayed at Lotte's place with my wife and 3 kids (15, 12 and 4). The apartment is full of character. If kind of feels like a beautiful antique shop, with rustic wooden floors and furniture. The place is a paradise for children with all sorts of beautiful toys. The location is absolutely the best you can get, walking distance from everywhere, right in the center, with great bars, cafes, restaurants and shops just downstairs. The neighborhood is full of character, just like the apartment, it feels kind of like staying in Soho.
Lotte was a great host, really helping me with a lot of information before and during the trip. She was always available and happy to answer and help.
I would mention that since the apartment is right in the center, and though quiet, it is not silent, so if someone is very sensitive to noise it should be considered.
I highly recommend and would definitely come back again.