It's only a good deal if they approve the claim.

There is a process, you have to book the hotel, then submit a claim, once the claim is approved they will give you the lower rate, and they send the gift card once your stay is completed.

There's a seven year thread in the Hilton forum with tons of reasons your claim will probably be denied

http://www.flyertalk.com/forum/hilto...ve-thread.html