I hope you have a great journey! Despite my personal vendetta against the price of PE, it is a great seat compared to other airlines.

There is little to complain about the A350 seat; every seat is the same, unlike the 777, where you can lift up the middle seat armrest IYKYK. If travelling alone (upon checking the seat map, this seems unlikely), I recommend selecting an aisle seat for more flexibility. The recline level may make getting out of your window seat difficult.

Ps. Your inbound connection is quite tight.