This one is an interesting accommodation. "Social house" is something like hostel with separate mini apartments. It's really neat, since you get all the privacy and authonomy of rental apartment, but with 24/7 instant support if you have some questions, and simple hotel-like check-in/out.
Apartment is clean, stylish and looks exactly like in pictures. Shower and toilet are clean and properly working. Mini kitchen is fully functional and has basic set of utensils. There is also shared kitchen in common area if need occurs (most likely need can be usage of microwave oven since apartment don't have one).
Only notable flaw is that, since it's a corner apartment with huge windows in the most touristy part of the city, it doesn't get completely quite at night. It's not critical issue by any means, there is no permanent noise, but occasional passing car or people in the street can be rather loud, so light sleepers should be wary. Don't worry about light pollution though, curtains are thick and heavy, so your night will be dark and cozy.
As for minor nitpicks, me and my spouse found pillows rather uncomfortable, but that's a very subjective issue. Also lighting in the room is quite dim, which is typical for most airbnb rentals anyway.
Location is great, especially for first time visit to Istanbul. 3 minutes walk to Sultanahmet Square, 5 to Grand Bazaar, 8 to Beyazit Square. T1 line tram stop is in 2 minutes walking distance. There are couple of grocery stores just around the corner, although covid restrictions might make their working hours not very tourist-friendly.
Only real downside of location in the middle of most touristy part of city is that while there's abundance of restaurants nearby, most of them look and feel like "tourist traps", so if you are looking for authentic or unique Istanbul dining experience then do thorough research beforehand. If not - don't worry much, use your best judgement, and you'll have pretty decent meal, if only slightly overpriced in the worst case.
Last but not least, all hosts were extremely friendly and eager to help. They kindly arranged for us a fixed-price transfer to aeroport, because we had flight early in the morning. That's a huge plus if you're afraid to deal with infamously scummy taxi drivers, like we are.
Overall, I give this apartment and team behind it my highest recommendations.