I liked it! It had everything; a good movie should. Some action, thrills and quick moving, and ..... just watch and see. I guess that if you can't stand sub-titles, it isn't for you, it seems to intimidate some people, when they miss something or can't keep up, then they blame the movie or think it's not good. I thought it was good and it isn't 100% Japanese spoken, there's plenty in English. Lastly, I don't think it was a waste of time to watch it.
We all know that most novels don't quite translate well into the screen...this was fair.