The Calgary airport is pretty good as far as airports go. I've never had a long wait at security and staff is as friendly as can be expected.
The one downfall of the airport is coming back from an out of country trip. To get to Canadian customs takes forever! It seems like you do the length of the airport twice. The signs that try to be funny about how far it is don't really help either. Just makes me roll my eyes and wonder who the hell designed it.