We indulged in premium economy but space was still tight and we’re not obese.
Only 2 bathrooms for the whole economy cabin. Hard to get there from premium seat at the front to bathrooms are the very back: there was always a cart in the way and no way to get around. Staff was obliging but not in a hurry or with a smile.
It took us a long time to get over this flight. (We went to Maui as it had direct flights, but it might be easier on the system to overnight in Vancouver.)