Originally Posted by Flyingbunny88

Just wondering, what is better if you plan for vacation way in advanced 9+months whether to redeem miles on PE and use eupgrade to J and keep the miles difference between PE and J, or simply redeem miles on J?

how do you minimize the risk of losing the J seat when time gets closer if you book PE and use eupgrades, and is it possible to change to redeem miles in J at the last minute (only if R is available) from any of your experience?

maybe this is case to case question, but looking forward to what general population is doing.