Sofia has been very helpfull and flexible, especially with the check-in time. The apartment is very clean and quiet, except at night on the street side. Very well decorated but not kids friendly (but we have 5-year twin boys...). My wife really appreciated the little quite bedroom in the middle.
I think this apartment is suitable for a maximum of 3-4 people of the same family, because there's just one shower and it's a bit too small.
I recommend it as a central flat, in a nice district of this wonderful town.