Anything I say in this review is probably redundant, because there isn't a single negative review in all the comments so far here, and I agree wholeheartedly with what has been said by other reviewers.
Nevertheless Hotel Rwanda is that rare kind of movie experience that doesn't easily relinquish its hold on the audience just because the credits have rolled. Watching with a friend, after ten minutes we had to pause the film because we decided we would be better served if we were more informed about what the basic facts of the conflict in Rwanda were. So to my shame, we had to read on the internet about what really happened, before we could continue. I say shame because we should have known, both of us were of an age when it happened to have taken more of an interest in world politics.
The film is beautifully understated, eschewing sentimentality in favour of raw emotion and letting the story tell itself. The acting was flawless - Don Cheadle's breathtaking performance being a particular standout - and the direction didn't falter, despite all the potential pitfalls of dramatising a recent and horrific conflict. The scenes which were hardest to watch in terms of tension and violence were often suffused with humour and hope.
It's difficult sometimes to separate the significance of the true story, from the artistry of the product, and often I get impatient with 'worthy' movies scoring big at Oscar time because it seems as though important stories ought to be rewarded, whether or not they make good films. However, I can't recall being so profoundly moved by a film since I saw The Grey Zone, and I hope Hotel Rwanda gets all the plaudits it deserves.