General consensus is it’s not worth it unless buying internet is more expensive per day for your group. most of the ‘Exclusive’ times for activities are at inconvenient times/days. The seating for shows tends to be not the best.
priority boarding means little.. you are behind back to backs, pinnacle, suites and wedding parties. The lowest tier gets called within 20 minutes usually of boarding begins.
the boarding day lunch is nice though. Priority tendering is a plus depending on port.