Overall, I enjoyed Mail. I loved the storyline and it's depth, but the only problem I really had with it was the horrid special effects.
Forexample, when the lead would pull out the spirit gun, it appeared as if the crew merely dimmed the lights and shined flashlights off mirrors at the lead actor. The same goes for the scene at the very beginning when the woman is sucked into the wall. When she falls out, it seems as if they threw rocks onto the set as she fell. Besides the special effects, though, I liked it. :D Most of the actors were fairly decent (except for the occasional extra who wasn't so good, such as the aforementioned woman at the beginning)
Also, I wouldn't consider Mail to be so much of a horror as it is a suspense/mystery movie. It wasn't scary, it just had ghosts in it. The movie's biggest strong points, though, were the plot's depth and it's ending, which is a big tearjerker.
It's cheap at Wal-Mart (which is where I found it), around 8 bucks, so I say buy it. :D
