First, all the 1-star reviews given are not a fair assessment of this new world itself. Just because people didn't read or understand that there was no actual DVD inside the case is no reason to give the actual product itself a 1 star. Just by holding the case at your local store, you can tell it is light in weight, and there is no disc inside. If you are any fan of The Sims series, you would know that this world, like any of the stand-alone worlds (i.e., Riverview and Hidden Springs) is only available for download from The Sims 3 Store online, and not on disc format.
So you take your code, enter it at the website and download Barnacle Bay. You get your world the same way as anyone else has done using Sim Points purchased from the online Sims Store. No difference at all. If fact maybe you made out better, because by redeeming your code (unlike those who just purchased using Sim Points) you get a couple extra bonus items that the others didn't get. So there's no room for complaints.
As to the world itself, if you like laid-back beach towns and pirate stories like Treasure Island or Pirates of the Caribbean, you will like Barnacle Bay. It is a beautiful world, spacious, pretty vistas, with lots of room to swap out lot sizes using the in-game world editor. If you don't like the size of the lots given, pick another size that fits or a place to put it that suits you. All the worlds are made to be rearranged and personalized if you so desire. So you can make it as adventurous and thematic as you like according to your own imagination and tastes. You are never "stuck" with it as is, and the game isn't going to play itself for you in only one way. You help make it happen your way.
The pirate clothing is fantastically done, true to character, and the objects such as the sailing ship diner and other nautical items are a real treat which lend to the jaunty pirate tone. The Sim families of Barnacle Bay are interesting and friendly (but if you don't like them, make your own), and there are some great designer houses here as well. Overall, this is a beautiful town with lots of fun new stuff for gameplay---and if you keep checking back, you just might find a secret treasure down in the hidden tomb beneath the ground on the backside of the island! I wouldn't be without this world. I'd give it 4-1/2 stars, but since I won't settle for only 4, I give it 5 stars instead.