Mehmet and Ali's place is outstanding. It is simple accommodation in a location that cannot be beat for exploring Istanbul. In addition, Mehmet and Ali are super helpful and can arrange a ride to/from the airport and give a great introduction upon arrival to the city. The unit itself is unique because it is built literally in the middle of an ancient ruin yet it is totally private. Walkability-wise you are right by the old town Istanbul area so even if you stay two weeks you won't run out of places to see. (Hint: walk through the Seven Hills Palace hotel to get the sea easily). Mehmet's place is great for a local feel and a clean, comfortable, nice experience with helpful, responsive hosts. Thanks guys!