Rather slow paced, this introduction to George Smiley, a very different sort of spy, proved to be a winner by the end. Lots of jargon to it, which is why it got four stars from me, but eventually I settled into it and found it more enjoyable than I thought. If you want a real look at spycraft, check this one.
For the longer review, please go here:
http://www.epinions.com/review/Tinker_Tailor_Soldier_Spy_9_Cassettes_by_John_le_Carre_Books/content_576200609412