I started watching it then something granny wanted came on another channel. This meant it got put on DVD.
Just watched it. Given it's now over a year since I last read the books ( Have all 3 and the Hobbit, so must re-read sometime ) I couldn't do a direct comparison. Looks like I may have to get the DVDs after all! :-))
BTW, this will not apply to HHGTTG as I know the books way too well! :-)