This is the best aparment we booked through AirBnb ever. New, clean, has all required amenities. Very quite - good sound isolation (big problem for other aparments in this city). Great location. Very important - building has 24/7 security. Mel is a great host that will provide all information you need and will resolve all your problems - god bless Google translate :). Out of 8 days we stay 2 full days in apartment without going outside and we felt like at home.
Highly recommended for staying in Istanbul.