The movie cleverly plays with typical Irish cliches, and has beautifully scripted characters that are perfectly depicted by both, the main cast as well as the supporting cast. And while it has it's surprisingly gruesome scenes and shockers, it is mainly a comedy, and one that is typically British and reminds you of movies such as the one by Edgar Wright, especially Hot Fuzz. It is full of little absurd situations and dialogues, which will make you laugh, if you like this kind of humor. The story is interesting and captivating, and refreshingly witty. However, the last third of the movie gets a bit predictable and a bit tedious. Acting is great, and especially the chemistry between the characters works out really good. And for a low budget production, this movie uses some of the greatest CGI scenes I've seen. The alien is not only perfectly designed, it looks great, and given that the movie relies heavily on CGI the interaction between actors and CGI is seamless. Responsible for the effects was Shoume Harrison who is known for his works on movies such as "Harry Potter and the Deadly Hallows" or "Captain America: The First Avenger".

All in all this movie is greatly entertaining, and refreshingly original.