I had a 5 hour layover in Copenhagen. I thought the aiport was airy and calm with good shops and places to eat. I did find the layout a little confusing but I had special assistance so I stayed fairly close to the lounge there. The prices of vending machines and cafes were not exhorbitant and the staff were helpful. Lovely staff in special assistance.
The biggest downside for me was the toilets were not Scandinavian standard, a little dirty and dated. There are cleaner restrooms in Budapest Airport.