Whenever I'm in long haul Cathay flight, I always chose row 55 bulkhead as it is close to the galley (easy to grab a food for a quick midnight snack) and far from the rest room...

The leg room is certainly more than standard economy seat and even if you are in the middle seat, you can leave without disturbing your neighbor...

The only big risk there is when your seatmate brought a baby and it ended up crying the entire flight..

But I'm really wondering why Cathay didn't consider those as extra leg room seats?