This is an OK film. It's not worth (IMHO) the fulsome praise lavished on it by some reviewers, but neither is it worth the ordure heaped upon it by others. It's a very middling film.
Bill Nighy is a hitman who falls for his latest target, and ends up protecting her whilst training up Rupert Grint who gets tangled up in his dealings and who he sees as a successor. It's an amiable comedy, with some great moments from Nighy in particular (who largely carries the film with his dry, detached demeanour). A couple of big set pieces are pretty funny but the film largely relies on charm to carry it through, and doesn't always have enough. There is some good support work from Gregor Fisher and Rupert Everett as the bad guys, especially Fisher. In all an OK film but not a great one. An inoffensive way to pass a few hours, and probably of interest to those who enjoy the old Ealing comedies such as Ladykillers, Kind Hearts and Coronets or Lavendar Hill mob (though lacking some of those films subtlety, charm or edge of dangerous darkness). 3 stars.