Stayed in this apartment during my new year holidays for 3 days. Before arrival the owner provided me with detailed photos of how to find the flat/room plus gave me some tips about how to navigate around Istanbul to get there.
One of the owners (Selim) met me in person and was extremely helpful and friendly. The hotel room I've booked at the other place before this one was a disaster and had a huge impact on my overall Istanbul impression so talking to Selim and getting such a friendly service was a breath of fresh air. They even provide you with printed magazines of destinations to visit and food to eat in Istanbul based on their own experience.
Location is also very nice, perfect match for people who want to explore Istanbul and it's famous sights. More than that if you are feeling like not going anywhere far away there is bunch of restaurants right around the corner + tiny shop that sells alcohol.
The only cons I can name is that bathroom might be a bit too narrow and room is a bit smaller than it might seem on the photo. But I guess that's just how the photos work plus since I was exploring the city all day long I never really cared and used room as my sleeping hub only. Street might also get noisy in the early morning.
TL;DR: a very nice room with a very nice and polite owner
Русский: приятная небольшая комната с удобным месторасположением, хозяин вежливый и доброжелательный человек.