We had a great time in Muge's place. Being in the heart of touristic areas of Istanbul and its proximity to grocery stores, shopping malls, and restaurants made this place very unique. It is also very close to the subway that goes to historical places in the city. However, if you're looking for a quiet place, this is not an option for you; there are night clubs and bars downstairs that could get quite loud at nights especially on weekends.
Muge was not in town when we visited but she made sure that someone met with us right in front of the building on time. She even let us store our luggages in the apartment for two hours before check-in while they were cleaning the place. Although the building is very old (for instance the floor woods making noise while walking on them), the apartment was very clean and well maintained with a modern touch to it as you see in the pictures.
Overall we had a great time in Muge's place and I highly recommend it if you plan to visit the heart of touristic Istanbul and you do not mind noise.