For some reason after viewing this, I felt as though I should be sitting back in bed and taking a smoke. And I'm as stridently anti-smoking a bloke as you're lilkely to find. :-)
Of the forty-five minutes of extra footage, a lot of little things and additions work (especially a five minute flashback sequence involving Boromir, Faramir, and Denethor, and a Faramir-Gollum scene near the conclusion), a few don't (the pipeweed scene is a little misplacec) but all in all it's pretty magnificent package, and I've barely cracked the commentaries and other extras.
Scott Bennie