The apartment could accomodates two guests with separated rooms. House were extended cleaned and cozy.
The host accepted my earlier check in considering my situation, and he was continuously aiding me to arrive his house safely.
The apartment is pretty far from central (Sultanahmet or Taksim), but it takes only two minutes to Tram Station by walk. It was very convinient and guest may entertain more Istanbuls aside from travel zone.
I will be staying at this apartment again when I come Istanbul later. This apartment is highly recommened to solo traveler.