I thought I would laugh more, or that my children (ages 4&6) would laugh more. They are both well versed in TS1 and TS2, but my 6 yo's primary concern was over how much garbage there is in a landfill.
Buzz is very funny, and Woody is very noble. And as a mom and former kid I found myself weeping freely over the resolution.
I would recommend seeing it, but I would NOT recommend the 3D. There were times when my 4 removed her glasses and claimed it was the same without them. It's not worth the extra $ for added depth.