Having flown the jump seat and the cabin on the 787 here are my observations.
Aircraft ride is unbelievably smooth. Due to gust load suppression and the wing design turbulence is hardly felt at all. Is extremely fast and easy to operate.
Having sat in the cabin all I can say is that it was a big let down. Basically the noise in the cabin during normal operation is quite unacceptable. There is an electrical humming which is constantly present which is quite annoying to say the least.
Nevertheless would love to fly it.