Bilge's apartment was very comfortable, it had plenty of space and was so close to the main attractions/shops on the Galata side (Beyoğlu, Cihangir, Taksim, Karaköy, etc) and also a 30 min walk to Eminönü. You can see the main monuments from the balcony and we also managed to quickly spot our flat from inside Galata Tower (the bright green shade helps), next to Galatasaray Lisesi. Porsuk, the cat living in the bookstore downstairs is lovely and will climb up to your room if you give her attention, especially during the weekend when the store is closed.
People mentioning the problem of going through the bookstore when going in and out is a non-issue, they know you're a tourist and it's all owned by the same people (flat and bookstore).
Lots of good restaurants nearby if you go to İstiklal Caddesi, as well as down the street towards Cihangir.
Overall I would recommend again.