It's nice enough for kids, but if you already know anything about physics, you're gonna be bored out of your mind. The explanations accompanying the experiments don't go much deeper than "it works" (not to mention the often lacking English translations), not even mentioning the scientific names of certain effects so you could look them up.

In addition, they seem to be slowly running out of money. Despite a recent advertising campaign, there are no new experiments, and everything is slowly but surely deteriorating. Several experiments aren't working properly anymore, and I haven't seen any maintenance work done within the last year.

The new outdoor facilities are still under construction.

All in all, if you don't happen to live nearby, it's probably not worth the trip (and the price tag).