Not since the original Paranormal Activity was released have I been so impressed with a POV-style horror movie. So if you liked Paranormal Activity, you'll definitely like this little jewel. The pace, story, and setting differs. However, the style and level of unsettling chills delivered are very much the same.
7 Nights of Darkness manages plenty of creepy scares to turn the frail of constitution into nervous insomniacs. I sure wouldn't want to watch it alone in the dark, and I'm a horror buff!
The acting is not going to win anyone any awards, but it's no notable nuisance...save one actress' performance anyways. Yes, there's some serious over-acting from a blonde named Lena, which is unfortunate because the film is so great otherwise. What a relief when she finally quit talking! After the unmistakeably bad performance moment by Lena, the film really picks up and shines... so stay tuned it's well worth it!
I found it odd that characters would mysteriously disappear, yet the others in the group didn't seem the least bit concerned about it. The camera style may be annoying for some, but if you watch TV's Ghost Adventures and aren't bothered by that style then you'll be fine. The FX are effectual yet simplistic, they get the job done well.
The ghosts aren't the usual stalkers or precocious poltergeists we often see in films. They are are plainly vicious and their stories are irrelevant. They aggressively terrorize with violence rather than just revel in their victims confusion.
For a movie made with a budget of about $5000 they certainly got a lot of bang for their buck and present their audience with a pleasing and enjoyable flick. For that, they should be proud, and you'll be glad to have watched it.