I stayed 7 nights in November 2017. ( 3rd floor )
Taxi from the apartment to the Atatürk airport was 52 TL.
Pros
Barbaros was kind and agreed on late check in.
The place was clean, nice bathroom and shower, beds were super comfortable, bedrooms are separated by the entrance (and not only a wall) meaning you have your own privacy.
The apartment has 2 bedrooms ( one bigger with TV, sofa and body mirror, the other one smaller but still good size - both of them have wardrobes & air cond. )
Kitchen is equipped with modern appliances.
Location is central - 10 min walk to the tram and to the grand bazaar.
Cons
The area is not very pleasant so try not to arrive late and walk with your group.
Internet works only in the bigger room and kitchen.
Air conditioning of the bigger room makes a significant noise in the other room.