Should i buy Japanese version of FF Advent Children complete?

so, i was walking past this store and i noticed it had a blu rat Japanese version of FFVII advent children complete. i just wanted to buy it, but i was afraid that most of the extra content would be in japanese and i am not going to spend a lot of money for something i could not understand. however, the movie itself is still in english, so, should i buy it anyway? or just wait for the actual english version? i just want to know for those of you who owns the japanese version, is the entire content in japanese?