Nice apartment, central location and helpful staff, all as described here already. Sadly our apartment wasn't ready at the check-in time we agreed on.
On a positive note, we were allowed to leave our luggage in the office, located in the same building after check-out.
Since the building is really old, the windows have only one glass and there is no proper isolation. In addition to the general chatter and street noises already described by others, right now you can here the noise of a huge construction site (new metro tunnels) right in front of the windows starting very early each week day. Additionally people hit the metal boards framing the construction site at night, which is really loud! Hence, we didn’t sleep well this week and used oropax almost every night.
We are giving 3 stars because the staff can’t do much about the city’s construction projects but we still would have liked to have known this before arrival/booking.