I was pleasantly surprised by my experience getting one of these e-upgrades redeemed tonight for a future stay. I have a week long conference at the GH Kauai in January, was able to confirm an Ocean front suite upgrade from my mid-three hundred range corporate rate for all 5 nights of the stay. I am temtped to use another one for a few nights in HNL, but would rather get in the queue for a Plat upgrade at the Moana across the street, those suites are amazing.

To the poster above who asked about the Park Hyatt SGN, there is no club, but you get a fab breakfast in the main restuarant and as a general matter food is very reasonable in SGN so get out an enjoy it and you wont miss a lounge. By the way, I like the suites on the pool floor (I think it's 5th floor), in particular the one at the very end of the hall is private, has a nice sitting area and direct access into the pool. Enjoy your stay, one of the best properties in Asia!