I won't exactly be the lone dissenter because I do think you should see them.
However, I come forth to present a small caveat.
We went to the see them over Thanksgiving week of 2011 and I will tell you that I have never in my life felt more like a herded animal than there. As we stumbled through the crowd, shoulder to shoulder with our fellow park-goers, strollers ramming our legs and ankles, focused entirely on not losing our daughter in the stampede, I thought back to the magical vision I had in my head when I anticipated what it would be like. The experience did not match my vision.
The lights were beautiful, but the horrific crowds really put a damper on our experience.
That being said, my husband, who is not a very big Disney fan and who complained and mooed his way through the masses that night, just said to me that he would like to go back to Disney World at Christmas to see those lights. So it obviously struck a chord with him.
Hopefully since you are going before Thanksgiving week you won't have to deal with such heavy crowds.