The airport consists of two long gate halls tied together at one end. this image does not begin to show the length of the halls:

http://www.brusselsairport.be/

The airport is very short on signs. When we arrived at the tip of one hall from MUC, we did not see a single sign to direct us to the main ticketing area to get tickets to continue to IAD.(remember, the LH-UA alliance cannot issue tickets for each other about half the time).

The airport personel seem to all do English very well, and we were escorted out the "in" door at customs to get our tickets at the UA counter.

Our international UA flight was at the end of the other hall. I think they have tried to make the airport seem as big as FRA.

The shared BMI(?) star alliance lounge was packed.