Found this on lonely planet, so had little hesitation in booking this.
The owner was helpful throughout our stay. He offered to arrange a pickup from airport (for 25 Euros), which was a smooth experience. The responses on email were very prompt and the suggestions helpful. The rooms are a bit on the smaller side, but the rooms and the property overall is well maintained and clean. And the price was great.
There are books to read in the lobby. There's a nice terrace with views of the Bosphorous. The location is a big plus. It is just 10-15 mins on foot from the Old town/Sultanahmet area. Many eateries and convenience stores are 5 mins away.More