The biggest advantage of this apartment is location. I was there with my husband his brother and our mothers and so it was great for the mothers to be all downstairs and shop without getting lost. It is very central, so walking to Mercato Centrale or S.M. Novella is not far, and walking accros the water to Piazalle Michaelangelo was not bad either.
The rooms are spacious, and fine for 4 people if you are willing to share a single bathroom. If someone is using the sofa bed, know that it is near the kitchen/dining area so they will be woken up!
Unfortunately, we weren't made aware of construction directly outside the apartment windows, so we had to keep the windows closed during our stay and could not enjoy wine by the window like in the picture! (there was scaffolding blocking the windows), so lots of dust too). That being said, it got stuffy during our stay. Minor complaint, but nothing that is permanent. Outside of that, our stay would have been perfect. Easy communication and easy to find.