I gave it a 6 (FotR I would have given a 7, the DVD Special Edition 8).
Why? Because it shouldn't be called The Two Towers, because it bears too little relationship to the actual story in the middle volume of Tolkein's novel. It is a great film, but it is NOT an adaptation, it is loosely (VERY loosely) inspired by it. Theoden is, after he's freed from Saruman's influence, a whining coward who hides in the hills? Faramir is a a "but for the grace of god" Boromir clone? Frodo ends up in Osgiliath, facing off a Nazgul on wings?The LAST ship leaving for Valinor? ELVES at Helmsdeep!?! The War of the Ring is about the genocide of Men?!? These last two in particular, show that Peter Jackson and co have a fundementally different interpretation of a core aspect of TLotR to what I have always understood as Tolkeins intention (and what is, IMO, in the text).
Peter Jackson's adaptation of the Fellowship of the Ring finessed a complex story in to a great film (allowing for the screw up over routes over the Misty Mountains, the silly computer game sequence in Moria and the unnescessariily radical change in Aragorn's character). But the Two Towers has taken his story too far away from his source for me to be happy with it using the same name.
Despite the Ents, and Gollum...