Dündar is an excellent host! Great communication and very friendly. Did everything to make us feel welcome and enjoy our stay in Istanbul. Even gave us his public transport card and plotted the sightseeing route on our map.
The place itself is in a great location, next to Taksim square and subway stations, it's also very close to the coach bus stop to Ataturk airport.
Rooms are furnished and decorated in a dadaesque style, and the people staying in other rooms come from all over the world, it almost feels like a flashpacker hostel at times. Loved the atmosphere. Clean and well equipped, You'll find everything You'd need for a prolonged stay.
Staying at Dündar's might not be for You, if You don't smoke though, as the host and other guests frequently smoke indoors, both in the common livingroom and the kitchen.