Tinker Tailor Soldier Spy

In the bleak days of the Cold War, espionage veteran George Smiley is forced from semi-retirement to uncover a Soviet agent within MI6's echelons. - IMDB
Anyone who has watched this movie? Or anyone interested to see this movie?

What can you say about it?

And how does it compare to the BBC series adaptation of the same novel of John Le Carré?