Was in ET on G-EUYX LIN-LHR yesterday.
Agree with others that the legroom was difinitely worse than in older cabin. Luckily I am not 6' tall so my knees were not pressing against the seat in front. Exit row is definitely the way to go.
While the cabin did look quite slick, I felt the seat was not as comfortable as the older one. I can imagine a 3-4 hour flight would not be very nice to my back.