This was my first rental using Airbnb accommodations, honestly, I was afraid of the experience, as you know many rentals could come just as total hype or have hidden issues.
I stayed for 14 days in Blue Marmara suites were just a true hidden gem, the small flat I rented was on the fourth floor, and has 1 single bed and another queen size bed.
The staff was very nice and friendly with us, they made sure that our stay is fairly comfortable, they lend us umbrellas for the rain and baggage scale for free to use and the cleaning lady was just delightful.
The room was as described, a clean and tidy place has heat, air-conditions Turkish tv and the water is strong and crazy hot we loved it after a rainy day.
Did not use the kitchen or the workspace, but they were as described in the basement.
If you want to stay in the Fatih area in Istanbul, this hotel is in a very suitable location for tourist destinations or the Camberlitash tram station which goes to the metro.