It was…alright. It also felt very cramped. Seating was 2-3 across. People had noticeable trouble walking down the aisle. Opening the overhead bins seemed dangerous as it could easily bang someone’s head.
I last took a 737 (unsure of variant, but wasn’t a Max) in 2022, but I don’t remember it being as cramped as the A220.
They are definitely felt much nicer and quieter than smaller planes like Embraer E175 or E195.
The 'buzz' about the A220 is that you can fly more people further while using less fuel. All of this is super exciting if you are an airline, but nothing that directly benefits you as a passenger. There are various configurations of the A220, but the most 'efficient' ones are very cramped.
A cheaper flight enables for this to happen, but does not guarantee it.
I looked up the Breeze example given, and while the seats and cabin do look amazing, I don’t see why the same couldn’t be equipped on a 737. That’s more a function of what the airline wants, isn’t it?
The A220 I rode definitely did not “feel big in the inside”.