Had my first A220 flight today, overall could not really say it was much different to a 737 experience. Cabin crew seemed green, we were delayed 20 minutes due to a “catering issue” , after takeoff crew came round almost an hour into our flight to serve a beef and mushroom pie that had uncooked pastry on the base, and 20 minutes later the offer of seconds!
On delay on departure was also mentioned by the unnamed captain who said they had to do a variety of recalculations on the numbers for an additional 10 minutes, I noted a check captain in the jump seat on boarding!
Overall I found the aircraft fine, but both the tech and cabin crew seemed very green.