The hotel is well situated in the historical area of Istanbul. You're within a 5-10 minute walk to the Hagia Sophia and Blue Mosque as well as the hop on hop off bus service that provides tours throughout the city. The staff at the Celal Sultan are very friendly and helpful, especially when it comes to organizing airport transfers or tours (which needs to be paid at the reception). There is a wide variety of food and drink choices at the breakfast buffet. The room was spacious, clean, and comfortable. Our only issue with the hotel is how thin the doors/walls/ceilings are. You can hear your neighbors talking from next door (or maybe upstairs) or noise from the corridor. However, there is not much that the hotel can do about this since this is a part of the hotel design. Overall, I would highly recommend this hotel for its good location, friendly and professional staff, and breakfast buffet.