My fiancée and I are going on our first cruise this November, a quick 3 day on the Joy to see if she's okay with cruising. Meanwhile we're also planning our honeymoon for October next year and had been looking at a Mediterranean cruise on the Prima or Viva. I've been trying to weigh the pros/cons of a Balcony vs Spa Balcony and as far as I can tell the Spa Balcony just grants you access to the thermal spa, nothing extra? But it also looks like I can just buy the thermal spa cruise pass for less than a Spa Balcony. I know the Spa pass "can" sell out, but does it usually?
-TLDR how quick does the thermal spa pass sell out, if at all?