While staying in the Aria, we went twice for breakfast.  The first time was fine - quick service, good food.  The second time, however, convinced is that that was our last time there.  We were there an hour, and no food.  The server was nervous - he brought us a complimentary fruit plate.  We walked out, but not before getting hold of the manager, who handled the situation very poorly.  Rather than empathizing with us, he asked us to go back to our table and he would look into it.  Instead, we told him we were leaving.