Spectacular! sums it up well.
You'll re experience your childhood in this beautiful park and if you have kids they'll love you for bringing them here. There are a also a couple of artwork museums here and there. There will be a lot of walking and amazement along the way. They close the entrance gates after 6 PM, so make sure you park at the correct gates, where you will still be allowed to leave after closing hours.
Discount for students and Quebec residents.