Sorry to revive an old thread but based on my (limited) search skills this seemed the most appropriate. Not a globalist but booked a room and then accepted the upgrade offer for a suite. Is this guaranteed or just an upgrade which will be chargeable on checkin if a suite is available? The upgraded rate was $200 cheaper than the going rate on booking hence why I’m curious if it’s a subject to availability thing like an airline bid type upgrade. Thank you for your help.