The musical segments on the whole are well done but the total product doesn't quite work out. Having said that its worth watching it for Meryl's performance – she takes on the role of a rockin' grandma like a duck to water.
The set designs/periodic props etc are quality. The casting is well done. The early parts of the film are the best before it seems to lose its way and ends up not doing justice to either Turing or the code breaking (watch the Bletchley Circle).
Unimaginative plot and I didn't think some of the special effects were all that good – they looked like special effects. The acting was ordinary and we didn't need another intense performance from Giamatti.
The violence doesn't dominate which is unusual for this kind of film – there is some time for humour and the characters in the main are colourful & well done.