We stayed at the Noa Apartments in April and had a great time. The apartment is exactly as the pictures, its clean and comfortable. One thing to note is that if you are a light sleeper you might want to bring earplugs as there is a bit of noise from the upstairs apartment and outside - but nothing major. It's also in a great location, with only a couple of minutes walk to the Galata Tower and about 5 or so minutes to the Galata bridge, we barely took public transport the entire time. We didn't use the gym but it looked nice and well equipped. There are lots of cafes and restaurants near by so you are never short of places to eat, though the kitchen is also very well equipped. Gizem was a very helpful host and quick to respond. Would definitely recommend staying here when in Istanbul