I have used this product at conventions and at home with excellent results, 2 tips for potential buyers:
1) 10 minutes or so before the game, place a heavy hardcover book on top of the mat, right in the middle of it, make sure the book covers the 4 central vertices, I've found the PHB enough for this. This way your map will lay flat for the session.
2) I have tried 3 types of markers, permanent, washable and dry erase. I recommend using the dry erase ones.
I won't argue about the quality of the movie, because that is NOT why I watched this, I watched because I love the Dragonlance Chronicles and what they started.
Did Dragonlance deserve better? absolutely, here is one thing you can do, if you have a kid, buy it for him/her, they wont care if it's using the latest animation techniques and whatnot, I am sure they will enjoy it.
This is not a movie for 20 year olds and up, despite its rating (PG-13), I think this is a movie for kids. It's a DVD only release and remember there are Dragonlance novels for kids.