I was actually surprised that it wasn’t as big as I was anticipating, but it is still a pretty cool building to see. When I was there there was an enormous heat wave. So much so that they had to give out water to all the visitors!
The views out over Belgium were great (apparently on a good day, and I guess for people with good vision, you can see out to Antwerp. I also thought it was hilarious that so much still reflects the 1950s view of the future. E.g. the “Decatron.”