As the title says it is a cosy small studio which worths its price.
Deniz and Deniz are nice hosts, and they are responsive. However, you need to be in contact with the staff who is barely speaking English, which makes the check-in and future communication a bit difficult.
Nice points:
+ good price
+ well-equipped consider the size of the studio
+ good location for being in Kadikoy
+ easy check-in and check-out
+ responsive hosts
points to consider:
* it is a free smoking place, so expect the smell of cigarette
* it is an old apartment
* it is not mentioned in the description, but you need to climb the old stairs which is quite difficult with the luggages, and if you have some pain on your knee or back...