I stayed a month as a solo 25 year old female and was really happy with everything. Burak was super communicative and made me feel very comfortable, also provided me a Istanbulkart card which is used to get on metros, buses, etc.
Do remember that Istanbul is hilly, something I totally forgot, the apartment is close to Taksim but there is a quite a hill you have to climb to get to the center. The metro is close by which is helpful, as well as grocery stores.
Solid value for the price I received.