We spent a wonderful 5 days in Istanbul at the Dersaadet Hotel. It was convenient for walking to the Blue Mosque, the Hagia Sofia, and a tram stop, yet a few blocks away so that the street was not filled with tourists. There were several convenient restaurants nearby which had only one drawback, no fish, as my husband is a quasi-vegetarian, i.e. eats fish. Focusing on the hotel, it was exceptionally pleasant. Breakfast was served on the rooftop and was a sumptuous spread, the usual tomatoes and cucumbers but with 3 or 4 cheeses to choose from. They also served scrambled eggs, "hot dogs" and biscuit, potatoes, a fruit salad, fresh strawberries, watermelon, and several types of jam. There was bread for toast, as well as sweet breads. At night, the rooftop offered (for a fee) drinks (alcohol) and/or tea and coffee, again with classical music. You could see the Blue Mosque from one side of the rooftop. On the other side was the sea.
Our room was a reasonable size, we could move in it, open suitcases, and had a chair and desk. There was always plenty of hot water for showers. We also had what was called a semi-sea view room which was a better sea view than the room we had the first night. The first night only a sea view room was available. We were in room 403. A new hotel is going up next door, but I don't think it will block the sea view we had. The room had two windows which you could open. And for those who want to always stay connected, there is a free internet notebook in the lobby, and if you are carrying your laptop, easy wi-fi access from your room or rooftop. Overall a great hotel with a staff ever willing to answer questions, call a taxi, advise over restaurants. I really can't think of any thing I would want to complain about. It could be a little cheaper, but it was comparable in price to Empress Zoe and other hotels I read about. Oh! It had one great advantage that often goes unnoticed, it had a lift!