Shahrzad's place is located centrally enough to be in Walking distance of Taqsim sqr. but at the same far enough to be able to get a bit of local's lifestyle and shop and eat at the places that are for locals rather than tourists.
The connection of the house is good, If you want to walk to Taqsim sqr., It's doable and I was doing it sometimes, but there is a big downhill and then uphill(Istanbul is built on top of several hills I guess), Otherwise there is a bus terminal right in front of the house that you can use for going to Taqsim or several of tourist sights, also there are taxis that take you directly and cheaply to Taqsim.
Bonus point: if you're not vegan/vegetarian, go to Kebapci Cavus which is 1 min away from the house and is one of the best kebab places that I have been to.
The house was clean, and there is an additional separate toilet other than the one in bathroom.
Shahrzad's place has 2 bedrooms with double beds and 2 sofa beds in the living room, I personally used one of the sofa beds and it was comfortable enough I would say. She also offered putting an additional bed for us in the roofed balcony that is connected to one of the bedrooms(which we didn't request her to do).
Check-in and Check-out went smoothly, even though I got there for late for check-in and for check-out I informed Shahrzad a bit late.
Overall, I would say that it was a nice experience staying at Shahrzad's place.