Another is a strange thing to try and describe. So, I'll start with my initial reaction to the series. The first chapter is really interesting, it immediately makes you interested in Mei and gets at least a little attached to Kouichi and makes you wonder about the town and the school.
Sadly, this is the high point. As the series goes on they just talk about the mystery surrounding the incident of the town and all the deaths, they never reveal anything about it. And the deaths, oh the deaths. If you've watched any of the Final Destination movies you are familiar with these deaths. Ridiculous things, like accidentally falling down stairs and impaling yourself on an umbrella. Which is a little more than jarring in a series that had taken itself seriously before that and continues to take itself seriously after that. The deaths aren't only ridiculous, they're almost boring, the characters that die are characters you don't care about and that have barely been introduced.
The characters are another down point. Mei starts out very interesting and seems to have a lot of story worth unraveling but as the story progresses Mei will sometimes just act like a normal girl then bounce back to being 'mysterious' and 'creepy.' It undermines any effect the first few chapters had. Kouichi is...bland. There's not much to say about him, besides his mother and his heart condition (which is quickly forgotten after the first chapter or two) he's just an average high school student.
The thing is, I really want to like this series, the first couple chapters were ominous and intriguing but everything afterwards is more of a let-down.