Wondering if anybody has any experience traveling non-rev on Emirates? Will be traveling on them this September from MRU-DXB-LAX or SFO.

Do the SFO/LAX flights, when operated with the -300ER instead of the -200LR experience weight and balance restrictions when the winds pick up?

Has anybody ever been upgraded by EK? I've heard stories of them doing that even if you don't have an upgrade agreement, but I doubt that would happen on such a business travel heavy route.

Thanks for any info!