Hotwire ratings are very contoversial. Go to this site. http://pub4.ezboard.com/bpricelineandexpediabidding
The only one I have confidence in is the 4 1/2 WDW hotel with a spa listed in it features for either $60 or $62 depending on dates (there is a slight chance that a similar rating could be given to the Hilton but I do not think so.) MOWC does not participate in Hotwire.
I do not believe so (Starwood Hotels which owns the Westin and Sheraton are not listed as Hotwire participants.) Although it's gotten better, Hotwire ratings may have no relation to other rating systems.