If you like Lord of the Rings and Harry Potter rip-offs, then this is the right film for you.
I have yet to read (and probably never will) the Paolini books, but from what I have heard, there isn't much to expect but... guess: rip-offs of Lord of the Rings and Harry Potter.
The film itself feels slow, boring and tedious to say the least. Even its length of 104 minutes felt twice as that. The territories explored in the movie share no scope of Peter Jackson's awesome trilogy nor do the characters have that special aura as J. K. Rowling's superb series (be it on books or the films). There ARE some worthy moments, but you have to look for them beneath all the chaos and clichés. Jeremy Irons' character is a redemptory man but you can't help look at the Boromir resemblance. Sienna Guillory is definitely Arwen in a more pro-active yet passive (?) character.
Features? Stick to your 2-disc DVD because they didn't keep much here. In fact, they cut out everything from the second disc.
My advice? If you liked the book, you're likely to enjoy the film. If not, if LOTR and HP are more your cup of tea, then watch it with (very much) lowered expectations.