If you want to take your chances, and don't mind looking @ a courtyard or "dipsy dumpster" for 6 days, save the $40.00 a day. If you want a guaranteed river view room, pay the extra. If you're not Platinum you're probably not going to get anything (comp's) unless you pay for it. Others probably have experiences where they've been upgraded. But,whenever we travel internationally, we don't like to be wondering for 6 months if a desk clerk will give us anything, especially in London.