Another issue concerns the windows. If you like a window seat to look out at unique sights such as the Greenland mountains, the Polar ice cap, the Canadian permafrost and tundra, avoid the 787. The windows are huge but are positioned from chin-level upwards, i.e. too high (say, compared to the Viscount). They have no blinds but are electronically darkened across their whole area, so when un-darkened they flood light everywhere around your seat and people watching videos/trying to sleep will complain. Even if you have achieved personal control of 'your' window, the cabin crew will insist on darkening it again. So for 9 hours out of an 11 hour flight you will sit in a totally darkened tube, unable to see out of the window while the best geography lesson in the world goes by outside.
When booking VS, look for an Airbus 346 on the same route. They have 2-4-2 seating and super windows with mechanical vertical blinds. We will not be flying in a claustrophobic 787 again.