Mom and I are booked LAX-HKG on seats 33 D and E. Couple things, they are main cabin extra, but are in the main cabin where there are more seats across than in the only MCE cabin up front (none of those were available). What gives? How are those seats? My main worry is the in arm entertainment (how is it?) and not being able to move arm rests up if our row is empty (when will checking seat map let me know if that is likely)? We are news at this all, thanks!