The departure from the original is understandable, but sad. So is the loss of the moody soundtrack. Still, we got to hear it once more during the end credits.
Don't watch it in 3D. I unfortunately had too and I would very want to see it again on the big screen in 2D to fully appreciate and get a second, maybe less biased, opinion.
That being said, it's a solid movie with a good story and intrigue. I just don't have the perspective to say if it's great.
Synopsis & information: http://www.imdb.com/title/tt1219827/