My biggest critique is that the smoke detector was left on the shelf- which is hazardous.
The sheet had old red/pink stains. Although the host said it was clean, and offered to change them the next day, sheets with stains should not have been used in the first place. The rest of the apartment was satisfactory when it comes to cleanliness, and it holds a very modern standard.
PS: If you are tall, beware the entrance to the bathroom.