Stayed at Mahmudls apartment for the weekend with extended family. Apartment was amazing - even better than pictured, 4 bathrooms, wi-fi working well, good layout with lots of privacy and great living room plus dining area with great view of the sea. Location is amazing - close to everything but in a very quiet street.
Mahmud was the best host we could ask for. He was flexible on check-in and check-out time, was waiting for us when we arrived, and was somehow always there when we needed some advice but there was no issue at all with our privacy. He is a very pleasant and intelligent person which helped make our stay even better.
Would definitely look up same apartment or others Mahmud might have when in Istanbul next time.