1) Lie flats cater to the lone business traveller; they're private and do not promote interaction amongst other travellers. If you're with your woman/man and you need to be touching them at every moment during the flight, it's not for you. If you're a more rational and less insecure couple, or you're a business traveller who
DREADS travel, it's gold.
2) Lie flats are not as comfortable as the old J recliners unless they're in the 180 position and you're passed out