I had two flights - BKK-HEL-BKK - last year and enjoyed the seat immensely. I'm flying back to Finland in a few days and will have three sectors (one the QF wet-lease) in this seat.
Heaps of room, except in the footwell. I very much prefer the restful decor and textured surfaces, as opposed to (say) the brightness of Emirates or the "clubby" Qantas.
There are heaps of video reports about the seat, certainly worth checking out before booking a flight. Not for everyone, I guess, but what a dull world it would be if we all liked the same stuff and all thought the same way.