For the price, the location and space was good. The view from the balcony was amazing - we loved drinking tea, beer, or eating breakfast there. In case you are not from somewhere with a lot of mosques, you should know that the call to prayer is very loud/long and at this time of year was before 6am. Most of us got used to it eventually but the first day when we were jet lagged it woke us all up and we were exhausted.
Hikmet was very helpful doing things like negotiating non-ripoff prices for taxis.
Istanbul is huge - there is no one central spot, but if you have a short time and would like to be within a very short walk from the famous Hagia Sophia and Blue Mosque this would be a good option.
I’m not sure if this is always the case here, but for us there was often a smell of sewage within the apartment - it was difficult to pinpoint the origin but it was definitely coming from inside somehow. We bought a scented candle to counteract this.