The keys were change during my stay and I was not informed about it. I arrived at 11:30pm finding out that I was not able to enter the building. I had to ring at neighbours flats in order to enter the building. The next day, I was not able to access the flat because the new keys were available only from 5 pm. I ask understanding and gesture from the owner because of all of this and the responded he gave me was really mean. The flat is nice, there is not light from outside however but I do not recommend you to exchange with the owner. Poor service for someone working in the tourism industry.