Let my experience be a warning to fellow travelers:
I was travelling to Prague for a weekend trip with a friend of mine. The host forgot our arrival and was unreachable on her phone, therefore we had to look for a hotel room late at night. Next day, we could reach her, and arranged our check-in for noon, which was her suggestion. She didn't show up at noon. We called her, rearranged the check-in for 1pm, which was again her suggestion. At this point we also stated that in case she won't show up at 1pm, then we will look for a hotel room again. She didn't show up. We will hopefully get our money back...