Everything. My husband and I have travelled quite a bit, and have stayed in some pretty basic rooms, which were basic but clean.
On entering the room, was surprised how small it was, that was not the problem.
On looking closer the towels were dirty, bedding had stains and pillow cases were stained. On complaining, they changed 1 pillow case and towels, but not the bedding. Saying they could see no stains there. We had the most restless sleep, my husband turned over his pillow thinking it may be better, and it was covered in long blond hair. Both of us are dark. The shower was dirty, and shower Matt had been used.
Personally, was glad to get out of there, didn't have breakfast there, went else where.
I know it is a 2 star hotel, but I do expect it to be clean. I begrudged the €60 I paid for one night.
I suggest they look into the cleanliness of their hotel before letting it. My recommendation to anyone looking to stay there, Don't !!!!