Is this the face that launched a thousand ships? I report, you decide. (You gotta admit, he's pretty.)
Having taught, or tried to teach, Iliad to several generations of college students, I figured I had to see this movie. I always explained to my students that a lot of the elements of the story of Achilles that we (well, I, anyway) were familiar with weren't found in Homer's poem. The wooden horse and the death of Achilles were the two major ones. Those are both in the movie, of course. You couldn't tell the story of Troy to a modern audience without them.
In general the movie follows the plot of Homer's work, with those two major additions, and it gives some details about what happens to some of the other characters that both follow tradition and don't follow it. I confess that I've never watched the more than 3-hour-long director's cut of the movie. And I probably never will, even though there might be some good material in it. It's hard to tell the story of Troy in a shorter film.
The acting is okay, considering the bad dialogue the cast has to deal with. Brad Pitt isn't is brawny as I would expect Achilles to be, but he sure can jump. Orlando Bloom is, well, Orlando Bloom, and as such not a bad pick to play Paris. Eric Bana is fine as Hector. Rose Byrne is a good Helen. The real standouts, for me, are Sean Bean as Odysseus and Peter O'Toole as Priam.
Troy isn't a great movie, but it's spectacular, and I enjoyed the way it picked up on some of the things I like most about Iliad. It's worth a look.