Originally Posted by
WineCountryUA
Interesting -- including domestic flights?
UA seems to added Advance Seat assignments (for a fee) contradicting the first and second sentence
Correct - domestic - see illustration below (cheap MR between EWR and PDX)
(Terrible highlights are mine; confirmation # removed for obvious reasons)
(Preferred and regular E seats are available for purchase; aisle most expensive, followed by window, and then middle)