So I went into gamestop, and was gonna buy Brink since I'm cheap.
And I brought it to the counter and the cashier told me the game was awful, and that it would be a waste of money.
What I want to know, is there any validity to that statement , or just another opinion?

First, question marks in the topic name would be nice, OK?
Second... it's a mixed bag. It's not bad, if you want nice story, music and visuals, but the gameplay needs polish and the singleplayer campaign is not really good.