We visited CN Tower in summer 2008. We got there at night in hope to see the night views from the top. When I purchased the tickets, they told us that the ticket to go to the very top had sold out. I was a little bit disappointed as we still have around 45 minutes until their closing time.
Another disappointment is that there are no access to go outside on top. We can only view through the glasses. The photos that I took are not great as the flash is reflected in the background.