We stayed here for 10 days and really enjoyed it. The building is less than a minute walk to Istiklal street and and very close to both Taksim square and Galata tower. Also a subway station is close by. There are many restaurants, cafes and shops around as well as multiple supermarkets in the same block!
The unit was clean and the host was very helpful during our stay there (elevator broke down and was fixed within a couple hours). There is a club downstairs so it gets pretty loud at night in the living room and one of the rooms (the other two rooms aren’t as loud).
If you want to stay very close to the heart of Istanbul and don’t have any issues with the noise at night, I would definitely recommend this place!