Watch if: you want a weird, British humour comedy, casual viewing, not a 'think very hard' movie featuring remaining m.p. Members, Williams and Pegg, but no duh, that's advertised. Bare in mind humour is selective.
Don't watch if: you don't like (or want to watch) the above I guess?
Review: Not Simon Pegg's finest work, however I would not put it down to poor acting or a bad script. Evidently the film, which has a very short runtime is clearly because Robin Williams, who plays as the dog, passed away during filming and therefore you can notice some scenes have not been done due to an absent Williams. The humour is reminiscent of monty Python, with all surviving members in it. However this alone does not hold the movie on its own as they are not the main focus and are used sparingly. I would of liked to see more of izzard!
All this being said, I felt that parts were highly enjoyable and went in knowing the problems production had (Williams, pegg and monty Python.... Who wouldn't be wondering what was up with that?) and therefore shouldn't be slandered so heavily!