Myself and my three friends really enjoyed our stay in Istanbul. Firat is a great host who ensured that our experience on what was a busy trip was comfortable and fun. He was very flexible with check in, ensuring that we could arrive late and making sure that the flat was in good condition, and he always responded when we had a query.
The size of the flat was more than good enough for our group, and the location of the flat is great- very central and within walking distance of Istanbul's top sights. A short walk down the hill will get you to the well connected metro, or you can pick up a taxi do the road.
Would certainly stay again if we were to visit the city.
Thanks again!