I watched the movie and if you don't compare the film to the anime it wasn't bad.
I mean there were some things that ı didn't like.Example Light was a clever boy and they said it in the movie but we only see that on the final scene.
But if you compare to the anime there were so many wrong things.
The acting was not so bad. Willem Dafoe was perfect Ryuk.
Anyway IMDb score was suitable for film. The movie was not bad but was not perfect either.
If you are not finding movie to watch you can watch it.