WC outside compartment
There are two WCs in the wagon, each at one end. One is the usual style, the other is the Turkish style. They are clean and have toilet paper.
Limited space for luggages
There’s a shelf over table in sleepers, where you can put luggages. It can easily take two big luggages. For more, you need to put it on floor.
For couchettes, floor is the only space for luggages, which may be a problem if all for passengers come with heavy load.
There are enough lighting in the compartment. One is nightlight, other two lightens compartment in two different levels. There is also reading light next to each bed.
Air conditioning is a little out of your control. There’s a central system which is controlled by TCDD staff. It makes the whole train cold in a very short time. Maybe it’s also for heating.
There’s also a heater in the compartment which is under your control. Buttons are over the door.