This in my humble opinion is one of John Waynes most overlooked movies. It is sandwhiched between the awful Rooster Coburn and the reasonable but ultimately inferior McQ.
The movie is slick, well acted and directed, features a host of well known British actors and is extremly enjoyable. If you haven't watched it already make a point of doing so, and while it may not be as good as 'Dirty Harry' its certainly much better than the four 'Dirty Harry' sequels.