Good movie

I saw this movie last night and found it surprisingly good. I have to admit that I used to read Agatha Christies' books as a teengager, and felt a little bit uneager to see this movie, but as the film went on I discovered how well the story was being told.
One can't help falling in love with all the characters, Prudence, whose name gives an opposite idea of her true personality, is very well portrayed and the actress's performance is just outstanding.
The plot follows the line of a good mistery story, and it is well splashed by a perfect and effective sense of the best humour which helps to relieve the tension of the background plot.
All in all the movies does justice to the book, saddly it is really underrated and limited to see.