Illusions

It happens that you sometimes realise that your expectations doesn't quite match the realities. This usually happens when someone do a great marketing job.

I admit; before visiting Niagra Falls, I did have expectations. I expected that I would be really impressed, because I have heard a lot about it and some said it was one of the wounders of the world.

Great or not, I think it's a matter of opinion and what you have as a reference. In this case I think the marketing people did a great job.