I had my first flight on an A220 today. While F seat pitch is a bit tight, the giant screens are great and the window placement is nice and high. I of course made a pilgrimage to the port side coach lav so I could pee while watching the world go by. LOL
In chatting with the FAs, they said they like the plane better than the 717 and Mad Dogs, but the tech for them is a bit frustrating. PA announcements don't pipe through the headphone jacks of the TVs. They mentioned odd things like being unable to get the lights to work in the lavs and other oddball stuff.