Ok let's get the bad stuff out the way first.
This place is EXPENSIVE, be sure to pick up a 50% off coupon. It's like $20 each.
The place operates on add-ons. Once you've parted with your entire paycheck just to get in, you then have to pay extra for the train/rides/snooker/boat/etc
A lot of the buildings are turned into shops which sell very little period themed stuff and mostly candy from 2013.
The good stuff:
It's easy to get to as the bus from heritage station stops right outside.
This place is BIG, so there's plenty to see.
There's free tours which are good.
People are dressed in period clothes and as well as being very friendly and saying hello to everyone they see, they are actually able to answer questions too!
All in all I really enjoyed my day, but the need to charge extra for things after such a high entrance fee spoilt it slightly.
Also some areas were closed due to two different weddings that were taking place which wasn't really fair on the paying public.