I saw a preview yesterday. It is excellent, just a wonderful film. Colin Firth and Geoffrey Rush are superb in it, even Helena BC (who I have an irrational dislike of) was great. There are some lovely witty bits to counteract the more serious parts.
I can't recommend it enough. If you aren't moved by the end I would suggest that you are either a) made of stone or b) perhaps haven't understood and should get back creating tickers over at the other site 
I'll be interested to hear some more reviews when others have been to see it.