It was a very nice experience, lots of pavillions from differente countries, activities, multimedia experiences, deep thoughts about water in the world. If you happen to come to Spain until September 14th, I strongly recommend you to visit Zaragoza and the Expo.
Moreover, my personal recommendations for this event: This weekend Expo passed the visitor 2 million so you´d better visit it from monday to thursday. The first thing you should do is taking the fast-pass to any of the more visited pavillions. There are over 90 pavillions, If you like multimedia I recommend you Japan, Germany, Morocco, Lithuania, Aragón and Spain. More related to design is the pavillion about thirst and the one of cities of water. Besides if you like adventure don´t forget to go to Extreme Waters pavillion.
There are also exhibitions, I show three: El hombre vertiente, El despertar de la serpiente and Iceberg.