This is by far the best zombie movie I have ever seen.

It's not hard to compare this movie to other zombie movies and fast notice the differences which makes this one stand out.

Location: most of the movie takes place on a train. The space is small and limited, which adds to the characters difficulties to adapt and survive.
Great characters: what I think is unusual in this genre is character development and a variety of fleshed out characters that makes sense. This is usually where I think most movies are lacking. I even cried watching this. Twice.
The special effects were great too.

Definitely a must watch in this genre.