Everything went well. The host was very nice and helpful. We were a family of 4 and we were comfortable in the place. If you are more than 4 i would actually consider comfort and privacy before making this decision. in reality the place can accommodate 6 people on budget.
Also, please be mindful that lot of residential areas in Istanbul are down hills and lot of them are in old buildings. This was ok for young people but a major accessibility issue for older folks.