It works best in big cities with lots of options. You can only bid once unless you add new regions and/or different star levels. There are sites that show previous successful bids like betterbidder.com

I tried it for a hotel room in Lincoln for Friday and Saturday night but didn't that great of a deal because of the high demand from the football game. Sunday night though we are staying in a 3 1/2 star place in downtown Lincoln for $90 where retail is $345.