This is a GREAT location in Istanbul - right by the Şişhane Metro stop, Galata Tower, and Istiklal Street. The hotel room was pretty, with an easy-to-use code to come and go from the hotel throughout the day.
My only tips - there is a deposit cover charge for the mini-bar in the room (about 200 TL). If you don't take anything from the bar, they will return the deposit when you check out (unfortunately, I didn't know about this charge ahead of time, and almost didn't have enough cash at check in).
The hotel's central location is great, but definitely bring some earplugs - it can get lively and loud at night.
Overall, great place, great location - would definitely stay here again!