This review reportedly contains spoilers. I can handle the truth.
It's very rare that a film ends with a geuine "wtf" moment but this definitely had it. It's an effective, well-shot, excellently acted film that requires a lot of thinking. But it's probably just a bit too oblique with its themes and various interpretations (ie there seems to be a reading in it about fear of female intimacy which requires quite a few leaps to support).
One of those moments where you walk out of the cinema and realise you've actually been grinning inanely for the last hour.
Although it never quite matches up to the excellent Kick-Ass or First Class, Kingsman is yet more flat-out proof that Matthew Vaughn may very well be the finest action director on the planet.
With some of the most gloriously violent and kinetic action ever seen on screen, a hilarious script and a cast all obviously having the time of their lives - where has THAT Colin Firth been hiding all these years - Kingsman is two hours of ludicrously enjoyable entertainment.
Possibly some of the clunkiest dialogue ever written, performed in some of the most astonishingly bad accents ever committed to film - and a huge huge waste of the potential of its cast. This gets 1 and a half stars for a couple of good action scenes and half a star for introducing me to the phrase "mfwic"