Cool looking museum with interesting displays. We went with the regular ticket, no special exhibits.
The dinosaurs were definitely a highlight of the trip! I am totally geeked out by them. I also enjoyed the Africa / Asia / Latin America exhibits and most of the animal exhibits. There is almost too much to see in one day, so I would pick the exhibits that stand out the most to you.
Interesting note: not too many drinking fountains. Is having a drinking fountain in the washroom a Canadian thing? We were confused Americans.