Nice place, professional AirBnB rental with all the features that you'd expect from a guest house. The place has 4 separate units, one on each floor. If you have issues climbing stairs, I'd suggest you get one or two (which still requires a moderate climb on one or two flights of stairs). I walked here from Taxim in about 15-20min as its mostly downhill and an enjoyable walk depending on the weather... the walk back would be slightly uphill so not sure if I can recommend but still doable for a non-couch potato. I've also walked here from the Grand Bazar, over the bridge, which was also a walk but doable. Overall, this place is located 3 blocks from the bus/over-ground metro station which can take you to the historic sites, the same distance from a Mosque, across the street from a pharmacy.
Best feature would be the place is clean, like new apt which is all to myself.
Downside (which can be improved) would be either darker windows or blackout curtains as its difficult to nap during the day