If you enjoy spending your holidays in an actual home (what the idea behind Airbnb used to be years ago) instead of impersonal apartments, Nefes' place is perfect.
It is incredibly well located to explore pretty much every part of Istanbul, very well stocked (although we personally didn't have time to cook) and the cats are lovely and super fun. We definitely felt at home and it added to our experience in the city.
Apart from that, Nefes waited for us to arrive at ungodly hours at night and was very helpful and easy to communicate with during our stay.