First of all I should like to stress that if you're one of those people who think that no one else can write Conan but Robert E. Howard, then don't read this. This is a good book, but it's not Conan as real Conan fans have come to see him (and I don't mean people who've merely seen the films).
Jordan is, as he has shown with The Wheel of Time, an able writer, and this is a good yarn told well. It lacks the brimming energy of Howard's original stories, but the lush settings are nonetheless described very well and there are plenty of the hallmark Conan features (a pretty girl, lots of swordswinging going on, that sort of thing) and the pace is all very adeptly handled.
But if you're expecting Howard (who is? the man was unique) then you'll be sorely disappointed and you'd be better off buying an original fantasy series (try Weis and Hickman's "Darksword" if you haven't already).