The location is great, close enough to everything and very safe.
If you walk 1 block east you have the beginning of hipster neighborhood with bars and restaurants, feels like Williamsburg in Brooklyn, or The Village in Manhattan, safe and not overly touristy. If you walk 4 blocks North West down the hill to Dereboyu Street, you have a very local scene (no tourists), with pretty cheap restaurants, hammam and a large supermarket (Namli Hypermarket). Taksim Square is a 20-minute walk, and that has lots of restaurants, shopping, coffee shops on the way there. If you want to go the must see Tourist attractions (Hagia Sophia, Galata Tower, Sultan Ahmed Mosque), they are all within walking distance of .5 - 1.5 miles.
The apartment was clean and exactly as described. The host arranged airport pickup and drop off at a reasonable rate, which was very convenient. Keep in mind that Unit #2 is actually on the 3rd floor and there is no elevator in the building, this was not a problem for us.
I would definitely stay here again.