I just tried using my 35k point free night at for a room costing 34,000 points and I couldn't use it. I called marriott and they said it's considered a "premium room" therefore it cannot be used. I checked the T&C and did not see any such thing. I told the rep and she said it doesn't say it online but their internal system doesn't allow it. To me that seems like false advertising, claiming I can use it for a room of up to 35,000 points when I can't.