I had a wonderful stay at Hazal's charming, spacious AirBnB. She was extremely responsive at all times, very patient with coaching me to the right location for check-in, and immediately as helpful as possible when I ran into slow internet issues (offering to come over late at night to reset the router and offering to lend me a signal booster).
The apartment felt large enough for this remote worker to separate work space from relaxation space. It was also well-equipped with truly all the basics one would need (some tea, water, and snacks at check-in; a washer AND a rack to dry clothes on; some essential spices and cooking oil; shower gel and shampoo.)
The location was great for me, as I was needing to take several appointments right by Taksim, which was about an 8 minute walk away. Bus stop very close by as well. Nice neighborhood, with a tiny corner shop with all essentials a literal stone's throw away, and several proper supermarkets within a few minutes' walk. Lovely as well to have a green view outside in often hectic, quite urban Istanbul!
To be aware of for future guests (these are not critical of Hazal or her lovely apartment, merely facts!) Stairs: quite a few going up to the apartment, and then there are more once in there. These do get quite narrow and twisty in the apartment itself: if you have limited mobility, this is probably not the best spot for you. Internet/wifi was fine for a casual user, but I had to work and take conference calls while there, and it was insufficient for this purpose... router is IN the walls and outside the apartment, so direct wiring in not a possibility. Power went out (on entire block) several times in the evening while I was there, for maybe up to a half hour; water too would fluctuate in pressure. As others have noted, AC is on the main apartment level, so in the heat of summer, the upper sleeping area might be a bit steamy? It was cool enough for open windows at night when I stayed, so I did not test this theory myself. There is a school nearby so you will hear regular bells beginning in the morning around 8-ish, and bring an eyeblind if you're a late sleeper, as the shades in the sunny upper sleeping area are sufficient to maintain your privacy, but not darkness.