We did the cruise from Cape Liberty NJ to Bermuda. Last year we traveled the same trip however we were on NCL Dawn. So I will compare both.
Boarding was a breeze with both cruise lines, on in 20 minutes without any hassles. However with Celebrity you needed to board a bus to get to the ship a few hundreds yards away. Not a big deal, But no one in past reviews mentioned it.
Once aboard I honestly felt, although a older ship. I kinda got the feeling that Celebrity was a classier act.(just my feeling). A lot was said about the aging ship, however if you look for it,you will find it, but not a big deal to my group.