I went to see this film last night, and to be honest I was very impressed. The audience did mainly consist of the over 60s, but the film itself was well written and sensitive.
To be honest it kind of changed my view somewhat of the Queen and the Royal family - and all the main protagonists came out of it very well (perhaps with the exception of Alistair Campbell).
The film basically follows the events following the death of Princess Di, and explores the relationship between Tony Blair and the Royal family. Sounds alot more dull than it actually is, and I would highly recommend this film.
Johnathon Ross gave it a good write up on Film 2006 last week, so with that, and your recommendation I think this film is definately on my "to see" list, not only that but, my "to see imminently" list, at the cinema with popcorn, fizzy drink and everything! :D