I have a domestic booking next month using United Miles on Aegean.
It too is booked into Class X.
On the United confirmation is has luggage allowance of 23kgs with 0 EUR cost for the first bag.
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When I go into the booking on Aegean, it says that seat selection is not allowed and no option to select a seat - so i'm not sure about the deal with seating........
Does anyone have experience of seat selection (paid or otherwise) on this booking?

Thx