You have to do analysis of the fares you've been paying on average for your trips so far to see whether you will come out ahead. Additionally, there's a $15k minimum purchase. If you plan on making at least 15 RT/year in F, then go for it. Otherwise, it will take at least 30 RTs to spend $15k you paid for the membership. The best part about PassPlus, IMHO(in addition to fare predictability), is the fact that you always earn the EQM bonus domestically... Also, important thing to note that with UDUs, you'll be ahead of many 1Ks on the upgrade list because PassPlus Economy books in Y, and upgrades clear by fare class within the same elite category.