Saw this last night with my mum (don't lol).
I'd give this film a reasonably solid meh/10.
***spoilers follow***
It was just... completely unremarkable in every way. it wasn't bad, but it wasn't good.
The whole capturing anti-matter thing, ugh. The cynicist in me wouldn't let that go, and the fantasist in me couldn't pretend to entertain it.
It was mildly boring, wholly predictable (i've not read the book), lacklustre in its disguising of set pieces (the build up where you're supposed to think the speaker of the clergy (or w/e he was called) was in on the charade so he could become pope), obvious in it's execution of set pieces (who didn't see Ewan McGregors character coming with that little gem?) , and really was only saved by the fact it didn't create one of those pathetic raomance-in-a-crisis things between the protagonist and his female cohort.
I've seen it, satisified my curiosity, and never need to watch it again. Again, it wasn't a bad film, i don't think i wasted £7.70 to get in, but i'll save myself the £13 it would cost on DVD.