I've not finished the module yet, but I want to write e quick review based only on first impressions.
The overall mood is very different from other modules I've played: it is less dark and very "light", there are some situations that remind me very closely the old Monkey Island adventure games: the clash between the two thieves guilds in the harbor, the gathering of a crew to sail from the island, the many (awesome!) treasure maps, the shipwrecking and survival struggle, and in general the jolly and humorous atmosphere. It also reminds me the good "Lankhmar Nights" module (freely available on the Neverwinter Vault website).
In these situations, killing foes is not the primary objective and thus you gain many XPs simply advancing in the plot, but there are also some fierce fights that require planning and tactical skills. I've chosen - as usual - my favorite character class, a female human rogue/ranger (and future shadowdancer), but some fighter levels may help since you need a good amount of hit points to survive some encounters.
I've bought the module at discounted price, and certainly it is worth every single cent.