Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great movie, great disc, disappointing 3D

Well, our whole family loved Coraline, so buying it on Blu was a no-brainer. The movie quality is what one would expect from a new movie (especially animated) on high-def.My big disappointment came when I checked out the 3D version. Rather than using the Real 3D technology as was in the theatre version, they used color-alternate anaglyphic 3D (like old school 3D movies). The included glasses are the typical cardboard type. It works well enough, but I was hoping for something a bit more advanced. Also, rather than using the typical red/cyan anaglyphic, it's purple/green, so additional pairs of glasses will be a bit tougher to come by.Why oh why couldn't they have stuck with the Real 3D tech for the disc? :(