I had a great stay here for two weeks. The apartment has everything of necessity: a washing machine, a dishwasher, utensils for ironing clothes, a vacuum cleaner. However, there is no microwave (yet heating up things on the stove worked out perfectly fine).
The apartment looks much like it is in the pictures, there are two beds in separate rooms (double and single), as well as a big couch in the living room shared with the kitchen space.
The WiFi is pretty good, which is often not the case in Istanbul.
Multiple grocery stores are close by, as well as a few cafes. The metro station is 10-12 minutes away, and right beside it is the Trump shopping mall.
Samet was a great host, always willing to help out when needed.
There are some things that could be improved: more kitchenware would be nice and a better seal on the shower. Still, these were mostly a minor annoyances, and I would definitely recommend Samet's place to stay in Istanbul.