This is a spacious, well-furnished apartment with a full kitchen (including oven) in a great location, just a 5-minute walk away from the Karsiyaka ferry station and waterfront, which offers public ferries across the bay to both Alsancak and Konak (the two main tourist areas) for the price of a bus ticket. The waterfront is lined with parks and bars/restaurants that seem to be pretty popular with the locals, but the apartment itself is located on a smaller, quiet street.
While I would not describe the apartment as dirty/unlivable, the shower, kitchen table, and refrigerator all would have benefitted from a more thorough cleaning. And the apartment smells mildly of smoke, which was not ideal for our non-smoking group.
Finally, we were Özkan's first AirBnB guests, and hopefully he learns more with experience. With us, he seemed to not understand the reservation or payment procedures, which caused a great deal of unneeded stress both before and after our stay.