It's a great movie but the book was better.
The kid bothered me. For someone that has been living in Max Max land for so long, you would think he would be less of a whiny little bitch and be able to handle stress better than he did.
I thought it was a good movie, but after all the kids dad taught him, why did he immediatly trust the dude at the end? In a deleted scene he even tried handing over his pistol to him. WTF, rule #1 was dont let go of the gun but he hands it over almost immediately!
My other thoughts were that family at the end must have been pretty prepared if they had that many shotgun shells and a working shotgun. Also, I wish they had taken the bow from the one lady who attacked them since you can reuse arrows and make new ones from scrap metal (which was everywhere).
The final thing I noticed was they kept walking by this sort of stuff
http://davesgarden.com/guides/articles/view/1559/ along with trees. They could eat the grass (insects would as well), dig up roots or eat the bark of many trees.