Way beyond expectations. Lots to do and see, well laid out, highly informative, and lots of helpful staff. We went expecting to be there for 3-4 hours, in the end we were still there at closing time (17:00).
Highly recommend the visit.
One word of warning - - The app that you use to book the tram tours is awful, it craches & looses your boarding card so when you make a booking on your smart phone SCREENSHOT the page & the staff (who are aware of the apps shortfalls) will accept that as proof of booking onto a particular tour.