We enjoyed our stay at Doug's. It has tasteful furniture, a spacious hallway, and a very comfy living room. The beds (two double rooms, one single room) were great; and the sofas in the living room could also have been used as beds. The kitchen is quite big, the bathroom has a spacious shower/bathtub. The apartment is at the top of the building so you will have quite some views and there is also a (very) small balcony. The music from the bars below can get noisy but that is what the entire area between Galata and Taksim is about: Lots of people, lively bars, small cafes, etc. There are plenty of nice places just aournd the corner!
Doug was very helpful and easy when we had to change our plans due to missing our flight. He gave us some good tips (hamams, where not to go due to the Gezi protest anniversary etc.) and has a big pool of information for which our trip was too short.