I booked Can's place quite last minute on an unexpected layover in Istanbul. He was quite responsive and allowed me to check in early.
Getting there: Can provided various methods to get to his place. Considering my fatigue, I opted for a taxi ride (approx.$15 from the airport). The address provided was very accurate so was able to find the hotel easily.
Location: Place is actually called "Galley" - it has a sign outside so it's easy to spot. It's in a pretty popular area so once you start wondering the streets you'll notice how vibrant the area actually is. Tourist hot spots like Hagia Sophia, the Blue Mosque, Arasta bazar etc are in short walking distance of both the hotel and one another. It's definitely walkable!
Place: The place was small but provided exactly what I needed. Clean room, comfortable bed, lovely view of the water and the shower pressure was great! (not always easy to find!!) Room also had a refrigerator with complimentary water.
Food: There is a restaurant in the building though not sure when it operates. Plenty of food options in the area anyway!
I was heading back to the airport and one of the guys was able to call a cab rather quickly for me since the place isn't located on a main street (where flagging one down may have been easier).
I recommend staying here :)