It looks very good, and reviews have all been positive, so I definitely plan to play it when it's a bit cheaper. But I don't really want to pay full price for a game with less than a dozen hours' gameplay, to be honest. It'll just encourage them to do more of it, and no matter what the quality, I like a little bit more content first time round, as I don't generally replay games*.
I'm generally patient when it comes to games* -- I still haven't picked up Skyrim, which does have the content but seemed just a little overpriced compared to other titles. Apologies that you're deprived of discussion re Dishonoured in the meantime.
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* Unless we're talking about Mass Effect