i do...i just saved us about $100 all told on an upcoming five night trip to magical wichita. in addition, as the date got closer and i was sure we were going, i booked a prepaid, noncancellable room online and cancelled the more expensive cancellable rate. two days later, i noticed that for .10 more, aaa was offering free breakfast on the same room.

i called hyatt. first agent said 'sorry, can't help you.' i was pleasant, hung up, waited 10 minutes and called again (i haven't been on ft two years for nothing. ) second agent said 'i can't fix this, but my supervisor can.' voilá! the rate's still not cancellable, which doesn't matter, but it now includes a hyatt breakfast for 10 cents more. yay!

it's well worth checking hotel rates as your travel date approaches. as others have noted, be sure you book your new room first, then cancel the more expensive one.