Cheesy, unrealistic, doesn't do the book justice at all. I had to read A Prayer for Owen Meany for AP English, and we watched this movie in class. We have a seminar coming soon that asks "Why do you think John Irving didn't want the name of his book to be attached to this movie?" If you both read the book and watched the movie, it's pretty easy to see why...
Basically, the movie trivializes the most important parts of the book, or just doesn't include them at all (where are the three cousins???) The scene where Joe's mom is killed by Simon's baseball is almost laughable because of how cheesy it is, what with its slow motion and everyone's shocked expressions. The scene with the bus crash is even worse because of how...unrealistic it is. There's an entire scene about how Simon can hold his breath for an unnaturally long time, yet he couldn't make it out of the bus when it went under? Really? Owen's death scene in the book (which is completely different from the one in the movie, aside from the fact that he was saving a group of children in both of them) was emotional and literally tied the ENTIRE story together. This, though...it asks more questions than it answers.
Adding on to the cheesiness, the kid that plays Joe is a really, REALLY bad actor, and I just can't take him seriously, especially when he acts sad about finding out who his father is or when Simon gets out of the bus. However, the kid that played Simon did a very good job and made for a pretty memorable character. Really, the only other roles in the movie with good actors were the Sunday school teacher and Joe's mother.
The only reason this gets more than a 1 is because the movie does have some pretty funny parts, mostly the Christmas pageant scene. Overall though, this really isn't a good movie. It might be okay if you watch it alone, but it simply has nothing on the book. If you liked the movie, I guarantee you that the book is 100 times better.