this is a mountain well equipped flat in a family orientated building the landlords, Eleyna and her husband are a young couple that will try to help in any way to make your stay comfortable. if you don't speak Turkish I suggest you use Google translator to communicate with them.
I had forgotten my laptop at home but Aleyna's husban very kindly offered me his own laptop to work on which was very helpful.
I highly recommend their place to anyone visiting Istanbul.