Not sure if you've made your decision yet, OP considering it's been over a week now, but I thought I would throw my two cents in.
Two things you need to know before you listen to my response:
1. My play style is very family oriented - I love building legacies and watching family trees grow.
2. I was so generously gifted this pack, so I did not pay the full price for it.
Here are my thoughts:
I love it!! Does it change the overall nature of the game? No. Does it add anything to family/generational play? No. But what it does do is give your sims something fun to do, and it actually is challenging. I created a thread detailing the first time I went into the jungle, and let's just say it did not end well. My sim actually died :lol: It wasn't part of a legacy or anything like that. She was just a one off sim that I had made to explore this pack. And the funny thing is, I didn't intend for her to die! She caught on fire, and by the time I realized that there was a pool, or she could just extinguish herself, it was too late! So if you know all the features of how to save a sim and are prepared, you will be fine. But I actually found it super enjoyable without knowing how to solve everything. It made it that much more risky.
Now, here is the thing. As I said, I am a family/generational player, so I will admit that the usefulness of this pack isn't that high for me. I absolutely enjoyed it the first time I went, but unless I am playing a story where I want a sim in a particular generation to become an archaeologist, which I may, then I'm not sure how much use I will get out of this pack once I explore all of it. So for me, the replayability isn't quite there. But what is there is a lot of fun. Now, I know the gurus addressed the replayability issue by making sure that you don't have the same experience every time you enter the jungle, and I tip my hat to how they approached that issue, but the fact is that packs like this I won't use all the time.
So overall, do I think it's worth it? I really think it depends on your playstyle. It doesn't really suit mine, but I'm still having a lot of fun playing around with it! So it is definitely an amazing pack, but whether you think it's worth it is up to you.