This is such a perfect place to stay in Istanbul! The location is the magic here – less than 5 minutes to walk to 3 key metro stations. The closest one is the Tünel, which is the 2nd oldest subway on earth (the oldest is in London) and we rode this every day, and it's the perfect connection to restaurants, shopping, and more metro stations.
A short walk up the hill and you're at Galata tower, which is an amazing place to hang out day or night.
The apartment is large and filled with light, the bed is very comfortable, the bathroom was great. We could live in this apartment. As others have commented, this is a walk up - so your legs will be in good shape at the end of your stay. Also, the building is in the middle of a plumbing supply area, so the scene during the day is filled with lively men talking and drinking tea. At night the area is quiet and safe. Just 20 steps away from the door is a truly amazing restaurant.