Normal
Haven't been on the Millie, but took a trip on the Infinity, which should have similar demographics. Didn't find any more cranky old people or obnoxious young people than on any other cruise (I take that back--lots of obnoxious young people on my last Carnival cruise). While my first Celebrity cruise was when I was 44, and my most recent one was when I was 48, my opinion might be a bit skewed. I like the line, the ambiance, and the service very much. I wouldn't let the reviews scare you--if out of 2300 people, one or two are whining about something, then things are still okay. Just blow off the complainers and look at all the good stuff.