Flutterby™! : Hotwire

So I've heard the various radio ads for Hotwire, supposedly a cheaper Priceline thingie, except that you get to see the fare first (you still don't know flight times). This is the third time I've looked up prices on it. At least this time it didn't lose to Expedia (unlike the first two times), but did lose to Southwest Airlines. I won't bother next time.