We stayed at Ferman Hotel for 4 nights during our visit to Turkey in late January. It was ideally located in the tourist part of Istanbul and within walking distance to the Hagia Sofia, Blue Mosque, Grand Bazaar and the various other attractions nearby.
It was my first visit to Turkey, and the staff were very helpful in providing us information on the surrounding areas in Istanbul. They helped us with arranging tours in Istanbul, places to visit and their opening times, and even general chat on things like Turkish history, Turkish football, electronics in Turkey etc which I found very interesting.
Breakfast was served cold, but was decent. Other reviews have stated people having breakfast on the rooftop which would have been nice, but ours was the floor below. I assume this was due to the rainy and cold weather when we traveled. The hotel also provided complementary Turkish delights and orange juice in the lobby which was nice.
Our room was located on ground floor right opposite the receptionist, so it was 2 second walk if we wanted to ask them something quick. There was a train line out of the window in our room, but I can't recall anytime it disturbing us. The stay was comfortable.
Overall, I think the hotel was a great experience. The staff were extremely helpful and the price was good. Can't think of any bad points for the hotel. I would definitely recommend it to others, and if I come again and if my budget allows, I would love to stay at this hotel again.