The apartment is very close to Taksim square and during our stay of five days we didn't use a public transportation even once - as everything we wanted to visit in Istanbul was reachable by foot.
The building itself is on the borderline as the area behind it can be a little dodgy, but we were taking walks only in Taksim Square direction and mostly during the day, and we didn't have any problems nor inconveniences.
The living room is spacious, charming and has a lot of natural light.
Enise was very kind and in contact with us through WhatsApp. There are some minor things in the apartment that need fixing (such as the toilet paper holder, and a few stamps on the wall that need whitewashing) but I think the apartment has a great value for the money and I would definitely recommend it to a friend.