The apartment is lovely and comfortably slept 5 of us. Yücel was super friendly checking us in and showing us around the apartment and was more than happy to suggest things to do. The apartment is a couple of km from the center, and so there was no noise outside the apartment at all. It was easy to get to the center by tube, taking only 20ish minutes. And was very cheap using the city explorer pass for the tube.
Would definitely recommend!