Think Pierce Brosnan and you think suave, dapper, intelligent James Bond. In this movie, Brosnan plays against type - and has lots of fun doing so (as does the audience). This is a film about a hired assassin who befriends a harried businessman... and it works!
This is a fun movie, with very good scenes (a riveting, on-the-edge Brosnan and a good, compliant "off"-the-edge Kinnear have some good lines). My only cavil is that Hope Davis, playing the oh-so-tolerant wife ("Can I see your gun?") doesn't appear more often: she could have been a marvellous foil to these men.
This movie is like a matador: it plays with the audience, while "going for a kill". The ending is awesome because a storyline (with a positive moral!) emerges: this is a frenetic, frantic and fun movie, which does deserve a wide audience.