It's great fun, with some wicked one liners, but sometimes you're not sure whether the director is in serious or comic mode. For me, Mark Strong steals the show yet again as an academic, psychotic drug runner. If it does have a fault it's the films tendancy to fall back on all the stereotypical quaint Irish quirks that you've seen in movies since the 1940s.
For a cop piss-take it's still a wee bit short of the brilliance of "Hot Fuzz". Though I'd happily watch it again, to be sure!