IST-FRA. The plane was very old seats worn out and very hard. The outside and the interior of the plane looked as if it had been used for a cross-country race. It did not give me the feeling that the plane was very safe! No priority of boarding was given to families with small children. The service was ok but not very friendly. Food was almost thrown into your face and was very basic. The prices are not always much cheaper than THY and their service and planes are a sometimes a bit better and sometimes much better. I will not travel with SunExpress any more if I do not have to!