Great watch, will watch again, and can definitely recommend.
Granted, if you're not a zombie fan, you're probably not even considering this one. Then you have the great argument about infection vectors (this is pretty classic, bite infection transfer), and slow vs fast (this movie is fast) zombies. I'm basically just pointing out why we can't have nice things, people argue about it.
This has a great cast: Ving Rhames, Sarah Polley and Jake Weber in particular. The production value was definitely present, and not just in renting a mall to trash, or even just the zombie practical effects.
The large scale scenes look amazing, and the details on the various infections are fascinating to watch. And sure, there is lots of quality gunfire (foley is good) and shooting zombies for people you are just in it for the action. While it's actually got some good (if dark at times) humor to it, it's not "Warm Bodies".
Of course the presence of zombies / apocalyptic situation / lack of central authority gives us great philosophical opportunity to discuss what life means and see how people behave, but this leans more towards survival strategy aspects.
If anything, I think that is where the "flaw" is in this movie: (most of) the characters are relatively competent so it detours some from typical movie formula relying on the characters to make mistakes to progress the story, but more of there is just a hopeless unending storm of bad things happening to them, it's honestly a little refreshing.
This is probably one of my favorite zombie movies, and I don't even like running zombies.