Arrived late at night and had informed them in advance about this by using Hotels.com "Send a message to the hotel" function. The hotel is conveniently by the airport, but you need to find out that the hotel reception is on the 4th floor since there is no information available except signs in Cyrillic letters. The receptionist said that my room was gone since I had not checked in by noon (yes, I repeated several times that we were talking about 12 in the morning, and not 12 in the evening). They had left my advance message unnoticed about a late arrival. Nevertheless, they made up a room for me after waiting 30 minutes in the night. The next day I saw people checking in and out also after noon, so I have no idea why there was a check-in rule by noon for me. Maybe they expected me to pay some extra cash to get things going during the night? No information about a check-in rule by noon at their hotel description page on Hotels.com either. The only positive thing to say is the location by the airport, providing that you find the hotel functions in that huge building. Also lots of noise in the hallway of people arriving and leaving for flights throughout the night.