I booked my room for April 2010 just to be certain I got a reservation at CSR. Last time, I was too late and they were all booked 7 months in advance. I was told by the TA that once the 2010 rates were posted (early Aug.) that my rates would change to those rates, so there's no "locking in" rates now with the room only reservation. The only advantage then, is at least having a reservation, as far as I can see.