Overall, great place that I would recommend staying at!
Location - A 3 minute walk from Cihangir Camii, the apartment is close to the T1 tram (7 minute walk - although there are some steps involved). It is also a 15-20 minute walk to Taksim Square and Istiklal street. The surrounding areas also are not too loud at night but have numerous nice cafes and restaurants that are great for breakfast and dinner.
Apartment - Has a great view of the Bosporous, which is especially nice at night. It is quiet - I only heard a little noise from upstairs 1 or 2 times over the course of a whole week - so it is quite well insulated. The mattress is comfortable and the rest of the apartment is nicely furnished.
Host/communication - instructions were exceedingly clear and Taigun checked in multiple times during the stay to make sure everything was ok.
A great value, and in absolute terms, a very nice stay!