My stay at Pelin's place was wonderful. The flat is located walking distance from Taxim square and there's a wonderful supermarket near by -- which is perfect for any traveller that likes to do a bit of grocery shopping as well. I loved the bed (I usually find it hard to sleep away from my own bed) and the charm of the apartment. There's lots of ventilation and the sounds from the street was not bothering me at all, as it usually dies down by bed time.
I would definitely stay at Pelin's place again when I visit Istanbul.