The place was great and Ertan was very friendly and communicative. The living area and kitchen get amazing light, and the apartment is quiet, but only about a 7 minute walk from downtown Kadikoy.
The bathroom is great and the shower was also amazing with an almost spa-like/hammam setup.
The internet was a bit on the slow side when there (20 mbps), but more than enough for working remotely for one person.
Would highly recommend this spot to anyone interested in staying in Kadikoy!