Definitely worth watching!
If you like zombies a lot and got a good sense of humor, it's the movie you want to watch.
Yes the story is kind of usual and nothing new in particular, but that's not what the movie wants to be good at. It's the screening, saying and the humor what makes it a brilliant movie.
It's probably kind of specific whether you like it or not (in terms of the type of humor), but if you do so you will enjoy the movie a lot!
If you want a comparison I daresay it's most likely similar to Shaun of the dead
I'd like to point out that this movie is trying to call itself a "comedic, horror", But after seeing this movie, the only comedic horror that you've been viewing, is M. Night Shyamalan's movie career.
This was just painful. I would have loved to been there when this story was pitched, by M Night