The apartment and the location is great. There are lots of things you can do in a walking distance, lots of good restaurants and cafes. Walking distance to Dolmabahce.
Note that the apartment is located in a historical and central part of the Istanbul so most of them don’t have elevator. You need to take stairs and if you have kids or lots of belongings, it can be challenging a bit. But Sinan helped us a lot in carrying the suitcases. He was very responsive and very helpful when we needed him.
Overall, I recommend this apartment and will definitely visit again.
Also there is a nearby public parking you can park for $3 per night. On Saturdays, there is a great weekly local pazaar in that parking. You can enjoy the fresh products sold by farmers with a reasonable price.