It's definitely a flawed film but it produced emotion and did move me. The end is a real punch in the guts. It's like a great 'B' movie maybe. They made some changes from the novel and I think they were a mistake:
spoiler
The major is elevated to a supreme leader,
Garrety's reason for going is much weaker, the end is changed (though I like the new ending)
We don't really get a strong sense of the physical suffering. The first third of the film is weakest I think but it improves from there. I appreciate that they hold focus on the walk, in fact we almost never look away from it. It did create interesting moments where we know a walker will die in the background and the others must keep walking, some interesting tension and reactions.
Some of the gore seemed just for gore's sake though. The deaths are senseless and shocking in their own right. I would watch it again if comes to streaming.