Koningsdam Vista AS or BS?

My sister is sailing on the Koningsdam and was just offered a Vista suite AS or BS upgrade for $399/person.

As I am not familiar with these cabins, can anyone tell me if this is worth the extra $$? My thought is no, they have a VC aft cabin, if it were me I would stay with what I have, thoughts?

I’d pass unless they want to be mid-ship.

Thank you.