I was very impressed with Hanna Hotel for the 3 nights I stayed there for a business trip. It had everything I look for in a hotel. It was clean, quiet, and had a very comfortable bed. The blackout curtains kept the room dark for sleeping, but there was plenty of light (natural and artificial) during waking hours. The bathroom was well designed and also had good lighting as well as shampoo, conditioner, and other toiletries people might want. The electrical plugs on either side of the bed were appreciated, and l liked the complementary slippers, too. Also, I loved that I could touch a screen on the wall indicating "Do not disturb" instead of fumbling with paper signs on a door handle. The room was bigger than most in Europe and Istanbul specifically. It was conveniently located about 1 minute from a major tram line, too. Although Turkish breakfast is not really my ideal start to the day, the array of breads, cheeses, and fruits together with yogurt and scrambled or boiled eggs was definitely sufficient. The fridge in the room was great for snacks I got at the grocery store across the street, and I was glad for the complementary bottles of water. Overall, I was quite pleased with this hotel and am not sure why it has only 3 stars when it's better than many 4 star hotels I've stayed at.