Had to make a visit before the pandas left! If you want to see the pandas in a reasonable amount of time, the key is to go early and make a beeline for it. The line can be well upwards of 2 hours. The weather is getting a bit cooler but the wait outside in the sun is pretty tough. There are exhibits and signage to keep you interested throughout the line. It starts outside and snakes around zodiac posts before it goes into a tent with air conditioning. Past that tent is another outdoor area before you reach the enclosure that has the pandas.
As for the rest of the zoo, one of the highlights for me was the Australasia pavilion. There are many birds that are not enclosed within the pavilion and may walk right up to you! Just a general observation that some of the signage is a little faded or outdated. Still a fun visit, especially for the kids.