I am not really a fan of the movie Cars either--my younger daughter saw the movie once--but my older daughter and I have never even seen it. But all the same, we LOVED everything about Cars land. It is classic Disney--the themeing of the street area is amazing! RSR is among my top 3 all time favorite
disneyland rides.
Another surprise to me was just how great Buena Vista Street is. I had no idea that it was going to be another Main Street--but it truly is.
You can really see just how Disney spent a billion dollars on this remodel--it shows. I went as an AP preview, and honestly didn't expect that much. I looked forward to it, but was stunned by how great it looked.
So, I would say go. I wouldn't wait very long to get on the Luigi or Mater ride, but if there is a way to grab fast passes and go on RSR, you will be glad you did. The restaurants in the Cars land area are also very cute.
We are going back for another trip at the end of July, and although I know we will be slammed with crowds--there is no way I will be able to stay away from Cars land.