If I deeply analysed this film I could probably highlight more flaws than good points but at its heart Shrooms is enjoyable, deserves credit for endeavouring to put a new(ish) slant on a well trodden genre, locations and acting are good and it has a very good ending.
This is one of those films that may well be viewed more favourably the second time around as I did spend some of the film wondering whether or not I liked it which is never a good thing; but it gets better as it goes on, intensifies in the second half of the film and for me ended on a strong note.
The violent scenes are almost solely viewed via the hazy drug induced hallucinations of one of the cast, not always effectively it must be added and in a lot of ways it is difficult to see why this was rated as an 18 cert. Presumably this was on the basis of the drug taking premise of the film. Not an awful amount of gore is seen, it is quite understated maybe a tad too much; there are some incidences of misplaced humour inserted as well and it has to be said Shrooms is not especially scary. The background story revolving around horrific events at an old abandoned Irish reform school is good but a little overblown and the Irish film board were very brave in their depiction of the "indigenous" locals which do conform to certain extreme negative stereotypes. In fact maybe the locals should have played a larger part in the film as the scenes that they were in proved to be the most menacing.
As already stated the characters were good, particularly the females and the locals, the story was good and the premise of the film revolving around magic mushrooms, Celtic Mythology and a 'haunted' woods/school worked well combined with this. A good effort overall, I would actually like to see this whole scenario re-visited as there is a gem of a film in there that perhaps Shrooms has not fully exploited.