I didn´t have the chance to meet Nina because she was travelling, but her husband was a great host, always available to chat, give informations and make my time at his home more confortable. The area around their apartment is very good, near supemarkets, the central and turistical area of the city, of public transportations (only 10 minutes walk from the subway) and some bars and restaurants. The room is really great, big, with a good view, good bed and some sweet ammenities like coffee, tea. They offer towels too.
The only thing I would suggest at the announcement of the apartment is that they make more clear that there is private toilet near the private bedroom, but the shower is shared, in another place - inside the family private area.
I had a good experience and recomend their apartment.