I flew back from DUB to LGW yesterday and got one of these exit seats.
Was nice to have the leg room, but then you are delayed getting off by all those with folks unloading their luggage from the lockers (lots and lots of f
ing luggage) Personally, I wouldn't pay extra for that.
They don't have tray tables on their exit row seats (or at least the a/c we were on yesterday didn't) so not sure how they will keep the punters who haven't paid out of them.