Booking for family at Christmas time.
Fare difference from W to Z fare was $219pp, after purchase option was $219pp as well.
I did want to get them E+ seats and what was interesting is that the aisle and middle bulkhead during booking was quoting $64 and $59 per seat (respectively), however 5 min after purchase of the ticket I went through "manage reservations" and the price for the same two seats dropped to $51 and $47.