I will write my honest opinion. I'm not a big fan of airbnb and I had my expectations adjusted for this visit.
This is a nice property if you are not picky and want a place to sleep. It has a great view and it's location has pros and cons. It is definitely placed in the most touristic area right next to the galata tower with the galata tower like view so you don't need to visit galata tower in this case. The crowd outside of the house, is insane at any point in time but the house is sound proof and you don't hear anything from outside. The view to Istanbul is amazing. It is located on the 6th floor with no elevator so be prepared to climb up the stairs. The building is really old and I found many things not standard including the stairs. When we stayed at this place, there was a thunder storm and rain so the ceiling started leaking water unfortunately to the coach. It was not a very pleasant experience. As I mentioned this building is really old and the entire neighborhood is old so please adjust expectations. Around the neighborhood, are many restaurants and shops. It is close to the subway so you can get the metro. The location is very crowded by tourists and it is very hard to get taxi to get there without nagging but the hosts are super nice and can arrange taxi drivers for you. Ask them to help you if you need that. Overall, it is a nice neighborhood. The house is clean, with good view and good enough for sleeping and heading out to do touristic things.