Perfect location on the European side, located on a lovely street with lots of cute shops and within walking distance of Istikal, the ferry, Cihangir, Karakoy, Galata, etc. The apartment itself is small but comfortable and charming, perfect for a couple. The heating and hot water were great, and the kitchen was fully equipped. Only thing to note is that there isn't a working washing machine, but that wasn't an issue for us.
Would highly recommend this place to anyone looking for an ideal home-base for a first-time trip to Istanbul.