Thanks Playalot. I am having a great time with GTW. My Sims are running a thriving bakery in addition to their start-up genius career. I put in a police station, hospital and a space museum (my favorite handy Sim from my main family built a spaceship there, and she went to Sixam after the wormhole was installed.)
Sixam is soooo beautiful, and I found out that the aliens are nice if you're nice to them --- just like most Sims. I can't believe I was so worried about getting this pack.
I started playing TS4 in September 2014, and now, I have all the packs --- except Spooky Stuff (I don't like anything spooky) and Romantic Garden Stuff (because of the bad outcomes of the wishing well that I've heard about).