We stayed for 5 days! We had a great experience. The room is located in the nicest neighbourhood of Istanbul Beyoglu (in our opinion). The room is very nice positionated in the centre of Beyoglu (3 min walk from the famous Tünel). Enough good cafes and restaurants in the direct vaccinity.
The most important sites (Haga Sophia, Topkapi, Grand Bazaar, etc.) are all walking distance.
It can be a bit loud in the streets during the night. Beyoglu is the hippest neighbourhood at this moment. We personally did not mind.
Enjoy your stay. We surely did.