I have not been inside the sphere before. I know the Postcard from Earth show has mixed reviews, though, so you should be aware of this.
Here's the general consensus...
The good:
- The visuals are amazing and extremely well done
- The first 15-20 minutes showcase earth's natural beauty and human culture, to where some reviewers described their feeling as "on the verge of tears"
The bad:
- The final 30-35 minutes of the show descend into an obnoxious, in-your-face, depressing left-wing message which casts humans as a parasite on the planet
- The show is incredibly expensive for the 50-minute runtime. The remainder of the time you spend in the "atrium", and not watching the show itself
- Some have complained that the hour you spend in that atrium is boring, and you're basically just watching unspectacular animatronic robots speak to you
BOTTOM LINE: This could have been a great, albeit pricey experience, where you find yourself immersed within a 360-degree world of beautiful sights and sounds. Instead, for whatever reason, the majority is a depressing political message about environmentalism -- one which even those who care about the environment will find grating.
It's really too bad, because even the 1-star reviews concede that the first 15-20 minutes are absolutely beautiful and well produced.