Nick's place is amazing. Spacious, clean, very modern with high-end equipment and decorated with taste. The location is great with a short (albeit steep!) walk to Nispetiye area with lots of great restaurants / bars/ shopping. Our favorite part of the house was the garden, totally private and secluded... and just gorgeous... which we hope to enjoy even more on a summer trip next time :)
Nick is extremely quick to respond to email and incredibly helpful. Being an Istanbul local and having stayed in several apartments/ houses in the recent years after moving abroad, i can tell you that Nick's place is one of the best you will find!