There are no reservations for breakfast, just walk up and wait to be seated with your preference of inside or outside.
I appreciated being on the upper floor, the balcony offered some privacy and was pleasant at night. Some may prefer the ground floor rooms that allow guests to walk right out to the lawns or beach while avoiding the ramps or stairs required for the second floor. I will say, though, that our 2nd room #(527) offered less privacy than others because the balcony was directly adjacent to the walkway (which I believe only occurs on a few rooms) where the buildings transition.
The Emerald Suite was on the 2nd floor of the the 500 building and I believe the same on the 400 and 600 building.
Also, if it hasn't been posted here:
https://minisite.domesresorts.com/domesmiramare/