Great hotel, with some caveats....
Nice, clean, located near many attractions. Comfortable room, very friendly and helpful staff. Once I actually found the place, getting around was really easy. Great breakfast too!
Next to impossible to find make sure to have a good map/gps handy or a knowledgeable cab driver They forgot to book my airport shuttle, which meant a bit of a panic to get to the airport, it ended up not being a problem, but be sure to double check that they booked for you. Got locked out of the main lobby....if you want to wander the city late night, be prepared to have the overnight guy sleeping. Luckily, I was able to call the front desk to wake him up and he was sleep on a couch in the lobby.
Located in Istanbul (Sultanahmet), Art City Hotel Istanbul is within a 10-minute walk of Grand Bazaar and Blue Mosque. Featured amenities include a computer station, express check-in, and complimentary newspapers in the lobby. A shuttle from the hotel to the airport is provided for a surcharge (available 24 hours), and self parking (subject to charges) is available onsite.