Keiran was very kind and always available since the very beginning. Check-in and check-out were extremely easy since he's got a system in place that allows him not to be even there to deliver the keys. The location of the house is great: karakoy is very chill during the day but becomes extremely cute at night with tonnes of small bars and restaurants (not the loud, party type). Super close to Galata tower and in-between the historical/sightseeing part of istanbul and the night-life, clubs and bars packed Taksim square. The apartment was clean and has just been refurbished. The terrace is very large but I wouldn't count too much on that since there is no light for evening dinners. Only tiny complaint is the wi-fi, present but not working at all when we were there, but I'm sure Keiran will promptly take care of that for future guests.