The apartment is pretty neat and clean and provided all the necessary things. There was a cleaning service lady who would come everyday to change the linen and towels, so overall a vert neat and clean place and good for a family or 2 couples (It was a 2 BR apartment.)
However one thing to note is that this apartment is managed by a hotel and you would have to check in at the hotel to get the keys to the apartment. We did not have a good experience in terms of response from Saban. He did not email us the address for the apartment and I had to email him twice with no response and then call to get the address. I had to track him pretty much few hrs before reaching Istanbul since he did not respond over emails. Also, he never came to meet us. He asked us to check in at SUR HOTEL and pick up the keys from there. No one knew where the Hotel was so we had to stop and ask at a couple of stores to figure out the way. All of this could be avoided if Saban would have given us the proper directions of getting there by train or cab. He said he can send a cab for pick up at the airport but that was 30-40 euros which is a useless expense since everything was well connected by direct trains from the airport.
Also, he never came to meet us at the apartment so we def. missed the personal aspect of getting an Airbnb apartment.
Overall the apartment was nice but if you are going to Istanbul for the first time I would recommend staying in the Taxim, Isteklal area and not Sultanahamet because most of the good restaurants, bars and great night life is in the Isteklal/Taxim area.