Hi. Thanks for everyone's reply.
Yes, I was interest in the load between JFK and YVR on CX888 and CX889 only because I need to travel between the two places some time in August.
I was debating whether I should get the $449 deal (L class) and hope that there will be no one sitting next to me, or get a $490 Economy Standard (H class) and use 30000 Asia Miles to do a upgrade. What do you think?