Adventures fun initially then becomes boring because of repetition. New game features good but too many glitches.
The new build features, traits, rewards and wishes make the expansion worth getting. New skills: Martial Arts, Nectar Making and Photography are a lot of fun for your Sim to acquire. Many new collectables have been added. Also, there are quite a number of new fish to catch and fruits for the gardener to grow. There are a lot of extra opportunities that require travel to different locations to complete.
If you haven't already bought it then wait until EA releases another patch for it. It currently has many annoying glitches causing crashes, Sim ages resetting, fridges no longer work correctly etc that are not third party content related.