I would take some of the other reviews about this film with a pinch of salt - it's not that amazing and it's not that gory, at least in the version I saw under the title "The Wailing". I also suspect a bit of cheating must have occurred to get it the 5.8 rating.
On to the film... It starts with some brilliant music, the sort you used to get in the early 80's horror films. This made me excited for what was to come, but sadly it seemed to go downhill from there. The problem with The Wailing is that it is confusing and the plot meanders too much. There's some dream sequences that go on for so long you forget they are actually dream sequences. Random scenes seem to be thrown together with no connection. There's also a serious lack of lighting, making it even harder to understand what is happening. It reminded me slightly of Lucio Fulci's "The Beyond" because of the meandering plot.
It does have some good points though. As mentioned, the music is great and gives it a real horror 'feel'. However they used it too much; it almost plays through the entire film and gets tiresome after a while. The atmosphere is quite good, and had the plot been more coherent this could have been a really atmospheric horror flick.
This really isn't worth seeking out unless you're a fan of Italian horror, even then you can still do much better. The UK VHS cover is cool though - I'll give it that.
