I've seen it and really enjoyed it. Worth all the nominations and 5 star reviews that it got - but it might depend on your mindset. Obviously, if you are not into that kind of thing you might find it boring. My wife isn't into that kind of wartime / computing thing, but she really enjoyed it.
It concentrates on the man and the struggle against almost everything, not about the machine or how it was built or how it worked - but that should be Oscar nominated, too.
Take a look, I think you'll like it..