I'm certainly glad I did. It inevitably won't be to everybody's taste, some people may balk at the idea of having to read subtitles (shoot me down for even suggesting it), others may have problems with some of the visuals (which were occasionally bloody and squirmy viewing)....but I was enthralled by the mixture of civil war story/dreamlike fantasy.
There was some great special effects (which were not over used, a pet hate of mine in many modern films) and there was an enchanting mix of Alice in Wonderland, Grimms fairy tales, many of Roald Dahl books and an ending reminiscent of The Water Babies ( that's not the film but the book, which had an altogether darker tone to the story). The overall look and themes of the film were interestingly dark (and at times a tad 'hide behind the couch scary', see pic), though anyone familiar with director Guillermo Del Toro's The Devil's Backbone should appreciate this reasoning.
If you do fancy giving this film a go, and I heartily recommend that you do, watch it with an open mind and you won't leave disappointed. Seriously, you've got rebellion exchanges with a mightily nasty military captain juxtaposed with a lonely young girls quest to find an enchanted underground kingdom....what's not to like?
Alternatively you could also choose to spend your 6 quid on The Santa Clause 3, or perhaps Jackass the Movie 2......though you will go straight to hell for having a particularly crap and misguided perception of what makes good cinema!