We had a lovely one-week stay at Ugur's apartment.
The location is great, right nearby Galata Tower and not far from the city's touristic sites.
There can be a bit of noise at night at times but that was written in the description/reviews and is to be expected in that area (but nothing dramatic).
Ugur was also very nice and quick to respond when we had questions.
Would definitely come back there if/when we return to Istanbul.