Pro:
+ First off
+ First served
+ Short walk to the (until now) free toilet
+ Death stares from all other passengers
Cons:
- Death stares from all other passengers
- Overhead space sometimes blocked by crew / safety equipment
- Bulkhead blocks you from stretching your legs
- Side tray usually less sturdy then seat back tray
- No storage under seat so have to get up for stuff unless it fits under the divider.
Would be super weird if this becomes an enhancement. But then again... It's BA.