Great place. Very clean, modern, newly renovated. Fully stocked kitchen. There are actually about 4 small 1-bed units in the building, so you may have your pick depending on availability.

The street is also ideally situated and within 5-10 minute walk to some decent super markets, restaurants, cafes and basically everything you need in life. the Grand Bazaar is about a 15 minute walk up hill.

I would also definitely make use of Saban's kind offer to book a car to meet you at the airport. He uses a very well established Istanbul transfer service. For 25 Euros all-in from IST, it can not be beat.