What is the economy plus seat configuration on WS 24 YYT-LGW? What does your $120 get you? I'm going that way early in June, and wonder if it's worth it to upgrade. Also, when I booked my flight, I was assigned seats. Not bad ones, either. I don't fly WS much (non *A), so don't know anything about how it works for assigning seats (I didn't pay extra), or what their econ+ is like.