Spent many years visiting the CNE. There are many rides, shows and fairs to visit in a single day. You might visit multiple times just to see the other things offered. There are also lively exhibits, dog shows, festivals, somewhat pricey food and a wide variety of intercultural exhibits. Nostalgia might be clouding my judgement a bit. You can get discount tickets if you're a school student, young child or senior citizen. The only con: be prepared for a lot of walking. Otherwise, I have had great experiences.