It is a very interesting and informative museum. Lots of interactivity. Ideally, you should come here with a guide, because there are a lot of exhibits and information.
There is quite a lot of information about our intelligence service, the inventors of spy devices and the spies themselves, all the information is presented in the form of facts, without any condemnatory or negative overtones, which pleased me.
A ticket to the museum costs $ 36 (with tax), I definitely recommend going.