very cool place. a bit pricey at 32 bucks a ticket for the 1.5 hr tour. we had 4 adults so it was cheaper to buy the membership (75 bucks) then we could get tickets for 8 bucks each.
interesting place....not really my cup of tea but my wife's dad is an engineer (they were visiting from boston) so he was all over it.
good place to take out of towners or if you really, really, really like hearing about a architect.