Maerts Apartment is a very good place to discover Istanbul. The location is perfect, from the roof terrace you have a fantastic view over the Golden Horn, the Hagia Sophia and the Bosporus. Very good restaurants and cafes are nearby. The apartment is very nicely furnished and also the staircase to the 6th floor is not too hard. We didn't meet Maert, but the communication was very smooth and Maert gave us a lot of great tips for restaurants, cafes and airport transfer. The only negative thing was a bad smell in the bathroom, probably from the old pipes in the house.