I watched this recently, and I have to say I found it quite appealing; it did an excellent job of building up suspense before the deaths, fluctuating at times to bring them out of nowhere, just to keep me on my toes. Sometimes I knew what was coming, other times I actually jumped because it came out of nowhere. Despite the fact that the teacher said that the curse was more of an indiscriminate natural disaster than a true curse, I found that a bit difficult to believe, especially at the end, considering the ridiculous amount of violence.
Indeed, the ending is the only issue I had with this anime: it just degenerated into an all-out gore fest, which ruined it a little bit, I think. What had been excellent timed death turned out to be just a random bloodbath, and I found that a bit disappointing...although the morbid person in me was laughing something awful when the kid who survived the falling chandelier was crushed by a falling pillar seconds later when he made a break for the door. That was just twisted. xD
The whole conclusion was quite unsatisfying, as well; it was building up quite well, but it didn't really have a proper conclusion, and the identity of the dead person didn't really strike any chords with me. It was more of an "Oh, so that's who it was" reaction, rather than an "OH MY GOD!" that the series had been going for up to that point with its continually violent and shocking deaths. It let itself down with those last two episodes I thought, which was a shame.
The soundtrack was something else I enjoyed, as well: it reminded me a lot of Jigoku Shoujo, especially with the creepy music box themes. Jigoku Shoujo tended more towards rock and metal tracks to build up suspense though, and Another was a bit more subtle than that, which was nice. I'm looking forward to when the OST is actually released; at times it was hard to hear, but what I heard sounded pretty good, and when I could hear it it only added to the atmosphere.