@Panda89 Hmm that's a great question I would say the answer depends on two factors 1) is fantasy, the whole swords, magic, prophesy, demonic creatures and wee bit of tragic romance your kind of thing in general
and 2) do you have the sort of mind that enjoys the vague ponderings of fan fic esque I wonder what happens next ...
If the answer to both of these is yes than I would absolutely recommend it, the story telling is of a kind of before and after progressing narrative, so even if he never finishes it it is still (sort of) all there it's just a bit vague and lacking in detail of exactly how the world went from a to b
If you're one yes one no I'd still say maybe start to read it as you've got it - but just see how you get on and if you're a couple of hundred pages in you're not feeling it just pass the book along to a charity shop or something.
Pros
genuinely novel and coherent magic system that simultaneously feels workaday, understood, predictable - the kind of thing that can be taught at a university AND ineffable, awe inspiring and mysterious - the kind of stuff of which tales are told and myths are built.
Places - feel real and really different, different places have different casts of characters who belong and fit in those places but would be almost unimaginably uncomfortable in other settings. The protagonist is almost unique in his ability to move between these different places 'fitting in' to each whilst somehow still remaining himself, just displaying a different facet of his personality. And even this ability to adapt and edit himself feels like a coherent and consistent element of his personality.
Characters and relationships - are rich, detailed and feel true and real.
Cons is as I said there is a before and after - the speed at which the then is catching up with the now it would take about 6 more books to complete the story and I'm not so sure Patrick Rothfuss is making as much progress as I'd like
Pros (simplified) if you can cope with an old man telling great tales of his youthful adventures without being explicitly told why he killed the King and started a war (they're called the Kingkiller chronicles so not really a spoiler) they're stories that are worth listening to.