Really nice apartment very near to Istiklal street. Quite interesting design, nice terrace, first floor is amazing, that's where you will spend most time while in this apartment. The lightning is my favourite part, however, some may not like that amount of different bulbs and lights, and may find the apartment a bit dark, but i thing it gives it more life the way it is now.
As for the cons: No TV in apartment, which may be a downside for some. Also, keep in mind that building is quiet old, so you have low level of soundproof, and could hear a lot of things that are going on in the building. Lastly, while the location is great, it is located on the hill (as everything around Galata / Istiklal), so you will have good exercise walking in and out of apartment.