If I were reviewing the film only, probably would have given it 4 stars. If 3D only, then it would have been 2.
The3D films that I have been most impressed with manage to really drag you into the movie with a feeling that you are actually there, this doesn't do that. Yes the film is well made and really builds the tension for part 2 (tomorrow nights viewing), but I don't think I gained any extra enjoyment over watching it on Blu-Ray.
It may be down to the fact that a lot of the sequences are shot in low light, which seems to set the mood throughout the movie understandably.
All in all, the triple play offers good value over simply getting Blu-Ray but don't just buy it for the 3D.