I just flew on a 77G in J in 11K. The footwell is noticeably larger than the non front row seats and it was very very comfy to sleep in. However, the first/(main) meal service is handled by junior BCs which may not be as preferable as the SP which works the left aisle at that time.

The F-ish lav is in front of row 11. There is also another smaller standard lav next to it.