Site has a lot of info and you can book flight/hotel packages. Prices are usually similar to other travel sites, BUT you can buy $100 gift cards at Costco(or Costco.com) for $80. I just bought 10 of them to book a trip for 2 flights from DC and 4 nights at Aria and saved $200. Also you can like them on facebook for a discount code for another $50 off.
If you book one of the really cheap hotels as part of the package, the total can come out to cheaper than the price of just the plane ticket alone since you are saving 20%, so you could use it just for airfare discount as well and not even stay in the crap hole you booked.