Was on the train at 06:30am (1.5 hours) after online check in began.
Positives:
Managed to get the last available time for a Palo sea day brunch and the last available time for BBB on formal day (17:15pm).
Also got Frozen Meet and Princess gathering for decent times.
Negatives:
Excursion wise, either of the 2 Tortola trips we wanted to do had sold out.
Forgot about PAT and didn't get round to that until 08:00 (3 hours after booking window opened), earliest I could then get was 11:30am. We're staying close to the port and have to leave the hotel at 11:00am so I guess this should work quite nicely!