Staying at Gizem's flat was my best airbnb experience so far. It is exactly as described, nice and clean, has everything I needed for 1 month's stay. The dishwasher, vacuum cleaner, the fan etc. The building itself is only 3 years old or less and the flat is modern.
It is located in a very beautiful part of Istanbul, close to the seaside and bohemian/luxurious part of Istanbul's Asian side (Bagdat Cd), not very far from the Sabiha Gökçen Airport. Grocery stores, cafes etc are all in the neighbourhood. 15 min on foot to a big modern shopping mall and metro station. Getting to the old part of Istanbul may take a while (although all kinds of public transport is only 5-15 min away), so the flat is best for those who plan to stay longer and engoy walking down the beautiful seaside like I did. Although in the city centre you will not find an affordable and modern place like this.
I did not meet Gizem in person, but she quickly responded to all my messages. Her parents helped me with everything when I arrived, and I did not have any problems during my 1 month stay.