It's a Sims Expansion Pack, it gets the job done, but no real advancements which should have been added in the original, which is why expansion packs in a monopolistic franchise/title as 'The Sims' games are annoying.
Anyways, its still worth the extra money if you have and enjoy The Sims, since The Sims is a truly addictive and fun game that hasn't lost its value in the 3+ years its been in the market... which is why a Sims 2 or Simsville hasnt been released, just keep unloading exp. packs till the consumers have had enough.