Well, if you really want to watch the game, don't go, you will see it better at home on TV.
But, it is something most people think is pretty cool, so the fact that you can do it for free seems like a fun weekend. The game is secondary, the event is the thing.
I have gone twice, first time was free and I thought it was a once in a lifetime thing, turned out to be a long football game.
The second time I paid for the ticket, could not resist the chance to see the Giants beat the Patriots in person, was almost worth it. Will never go again, it is just a game. watching at home is much better.