My "guess" is that if available, you have a good chance of being upgraded. We had a lovely 3 night stay here last month booked into a standard room on points. As Globalists, I did request a suite upgrade, if available, and they did upgrade us to a standard suite which was a great surprise. No view or large windows like the Diplomatic Suite (as expected) but beautiful nonetheless. I concur with all the others positive reviews and I will be dreaming of that buffet breakfast and gorgeous dining room for a long time!