Saban was great at communicating throughout the whole process. He arranged for airport transfers for us, which unfortunately did not work out when we traveled through SAW airport on the Asian side due to traffic holding up the driver. Everything in the apartment was just as pictured and check in was easy with Sur Hotel which manages the apartment. It was nice having the front desk available to help with reservations for restaurants and a Turkish bath.
Everything was clean, the water is very warm but will run out if you use it too long (my mistake the first day), and it is very easy to get to a lot of the museums and historical sites from the apartment by walking. Having a fridge was really convenient for storing leftovers.
The only problems we had with the apartment were that it is not very well insulated against sound from other apartments or outside and that the internet is not very good. The call to prayer woke us up very early every morning and a couple times we were unable to get back to sleep due to what sounded like loud arguing of some people either outside or in another apartment. Sometimes the internet would completely drop for 10-15 minutes and other times it was just very very slow but we spent very little time in the apartment and this was only an inconvenience when we were trying to select a dinner location or check email.
I would also strongly recommend that anyone else coming to stay look into reviews for Turkish bath locations other than the one recommended by the Sur Hotel. Our friends were in Turkey at the same time as us and had a much better experience at a different location not that our experience was bad, it just seemed like the selection of services was lacking.