I found YYC to be an easy to use airport. More importantly, I am really thankful for the kind guidance I received from the airport staff to find my way to transit in a city new to me. Signs clearly mark the services and areas; washrooms are adequately nearby, kept in fairly good order, and have been placed in good numbers.
My only complaint is that in some areas of the airport, particularly the arrivals area, the wifi that worked so well during my initial arrival in the customs area and the lounge areas where I waited to board didn't work so well in the arrivals and concessions areas. I'm hoping some expansion/upgrading of the system will come online at some point.
I'm looking forward to another visit of a dear friend in Calgary, and with the help of YYC, it'll be another great time.