The apartment is very spacious, 2 fully separated bedroom and one living room. The kitchen is very well equipped. The cozy terrace is very useful, it was nice to sit out in the evening or in the morning :)
Taksim square is very close, and it is easy to reach Findikli tram station too by few minutes walk (warning: the street is full of cute friendly cats, so if you like them, this few minutes can be half an hour if you pet all of them, like us :D). By this tram you can reach directly the Sultanahmet area.
We did not have problem about sleeping, but if somebody is sensitive about noises, it is not the best choice, or bring ear plugs, because there is a party place around the apartment, and a bit noisy at night.
Musa was very helpful, the check-in and check-our went easily too.