I saw the Road upon the recommendation of my BIL who said it was fantastic. My initial reaction to the movie was the same as yours, but I found that days, weeks later I was still thinking about it. My dh and I watched it together and later I found myself bringing the movie up quite a bit in our conversations because of all of the parallels that I was able to draw from having seen that movie.
The movie indeed is not for the faint of heart, and I would probably never watch it again because it's disturbing, but I don't regret having seen it now because it has caused me to think and ponder things that I wouldn't have if I hadn't seen it.
But two okay three things that bugged me about the movie itself (apart from the story it was telling) is why did we have to see Viggo's butt so many times :ack2:? Why in all those years he'd been walking south with his son hadn't he learned to enter a house more quietly? You'd think he'd have learned to be as quiet as an Indian by then considering any encounter could mean death at any moment? And WHY did he leave his son alone so many times when he didn't have to if his whole thing was trying to keep him alive. Other than those things, I thought the movie was supremely acted by all parties and how happy I was to see Robert Duvall in there too. I love him. :)