I wouldn't put too much stock in what someone has posted about boarding time going by cabin class. Going on almost 30 Oceania cruises and haven't really seen that to be the case. I pretty much show up when I want to and get in line and check in. NOW, on the other hand, actually having your room ready is by Cabin Class, Top Suites first, PH, then on down. Most rooms are generally ready by 3.