My girlfriend didn't get to meet John, but his wife Masha was very nice and thoughtful. They sent us very clear directions and alternative routes in case of possible repairs on some metro lines.
The apartment is very easy to find, in a very nice and beautiful neighborhood. Masha was very kind from the beginning, showing us the apartment and letting us know we could make ourselves comfortable.
The room is as described, very bright and very nice. We could even spot some squirrels through the window.
We had a lovely stay and we would definitely recommend it.