Stubhub is one of our ticket providers although we'll be competing for the same traffic. And yes Stubhub rocks - our other providers are so far behind them it's not even funny.
If all you want is a cheap ticket than stubhub seems like the place to go, stubhub is the cheapest on all of the ticketstumbler searches I have done.
However, If you want something rare like courtside at the lakers.. Stubhub might not always have it, but ticketcity or some other place will. Thats where the value of TicketStumbler comes in I think. Its a useful site.