My family and I were living in Serkan’s apartment for 1,5 months.
There are a lot of good things there - the very first is location. 5 minutes to Marmaray/metro bus, 10 minutes walk to the port - really the best location in Kadikoy! There are a lot of cafes, restaurants and shops right across the street. The apartment is fully equipped (washing machine, dishwasher, good furniture and nice decoration). We cooked at home - there are a lot of pots and kitchen stuff there. In apartment there were bar stools and tables, for us it was uncomfortable. We were living there with small kid and asked Serkan for dining table and dining chairs - he bring it for us that day! Serkan is very polite and always trying to solve our problems and ask questions. Apartment located on the 4d floor and there is no lift, note this. But for us it was ok and we used to it very fast.
If you want to live in a good apartment with perfect location and good view - i suggest you to stay there!