Whenever I see a horror movie on IMDb rated between 4.0 - 4.5 I can be sure it's going to be fairly decent budget at least, as even the best horror usually doesn't crack 7+.
This isn't the most original story ever, but as far as "zombie" flick, you gotta give it some credit for not being the exact same as 99% of zombie films.
The story itself is just okay, but enough to keep you watching. 6/10
The budget was solid. No iPhone 4s filming. 8/10
Acting...it was fine. 6/10
Overall it kept me entertained and if someone brought up the film, I'd remember it more fondly than negatively. Take that for what it's worth. Also, I think this was much better than the sequel.