Celal was very friendly and helpful. We stayed in Istanbul in Ramadhan and threee of us were fasting. When we arrived at the appartement, it was already "ifthar" and we need to find meals. Celal took us to some restaurants, gave helpful information, lent us Istanbul card for taking transportation, and helped us when we need something (umbrella, shuttle to airport, etc). Very responsive. And the place, it is close to many attractions. Just take 10 minutes walk, and we reached blueMosque and Hagia Sophia. and many restaurants along the street that we could try. Nice.