We had a really nice stay at Alberto's apartment over the New Year for nearly two weeks. The location is very central and you can walk just about everywhere from here. there is a great selection of restaurants, bars, clubs and museums, all within a short walk of the apartment. Yet, the apartment is very quiet, with virtually no noise from the outside (even on New Years!) - So, you will sleep very well!
Although this is a 4th floor 'walk-up' (no lift), it just adds to the charm of an old building. There is a secluded outdoor terrace, where even in late December, it was possible to have a nice lunch and enjoy the clear blue sky and fresh air.
Overall is was a lovely stay - would highly recommend Alberto's apartment!