I read a large chunk of it last year (I bought a Penguin Classics version which looked like it was complete, but it only contained the first third). It is def worth reading: he does a v.good job of conveying his main ideas and most of them are at the very least important historically, if not always right. There is an awful lot of digressing about e.g. the historic price of silver, which is mostly dull and not v.illustrative of his theories, but my edition helpfully gave detailed instructions on which bits to skip first time through.