I don't want to freak you out but we have not had good luck when arriving late. There have been trips when I have talked to the IPO about room requests, told them we were on a later flight, and they've practically given a 100% guarantee we would have the room we want (sometimes they even give me the room #) but then when we arrive we aren't anywhere near where they said we would be.

It's very perplexing. I'm not sure what happens in the line of communication, maybe IPO doesn't have much say in what room you will have as they think they do. Also I think the squeaky wheel gets the grease when it comes to check-in. If someone checking in early doesn't like their room location I think they can move people around as long as they aren't changing anyone's room category. This is the main reason we stopped taking later flights. I hate dragging in tired and late in the evening only to have to deal with "this is the only room we have left". People can argue with me if they want

but I have had this happen on many occasions and I'm basing it totally on first hand experience. Read the trip report in my signature if you want to hear a check-in nightmare. And that trip wasn't even late, I think we got to the hotel mid-afternoon. This next trip we are flying in very early, plane lands at 8:45 AM so I am very hopeful to get the 3rd floor. (fingers crossed!!!)