The dungeon exploration system is cool. I love the collectable relics and but the worlds themselves just lack the entire vacation feeling, and the experience lacks the consistency of content that was prevalent the Sims 2 equivalent. Cultural differences are hardly visible at all. All three countries feel and function pretty much the same, except the fact that you can buy some different stuff, explore different buildings, or learn a couple of different songs. Gone are the variety of hotels, spas, local dance styles, quirky encounters, fun activities, etc. It all just lacks flavor. I also personally miss having a tropical island option for my vacations, though I suppose that's a matter of personal preference.
All in all, would not recommend as first priority if you're looking to buy DLC.