Flew my first one last week from EWR-LAX.
I've used this seat on the 77W before but wasn't prepared for it feeling more more narrow in a 1-2-1 configuration on the 787. There's definitely limited legroom in the middle. That said, if you're flying with someone the center seats which face forward are a nice way to travel together, though it's really easy to accidentally raise the middle divided without meaning to.