Avantages
There are lots of interesting problems to work on and coworkers tend to be generally supportive. Expedia is also one of the most diverse companies I've ever worked for - truly a global company and people have a lot of respect for different cultures. While opportunities for promotion are at times difficult, opportunities to work on a different team or project are abundant if you're bored with your current role. Coworkers tend to be a very smart bunch - I'm not sure I've ever met a stupid person at Expedia. People are generally kind and typically respect the work-life balance needs of their coworkers.
Inconvénients
The company cannot seem to get a clue when it comes to delivering software in an agile fashion. If somebody comes up with a brilliant idea, it's either left by the roadside because it would take away currently allocated resources, or the idea dies on the vine because people are busy trying to gain consensus and trying not to rock the boat. I'd expect this kind of Dilbert behavior out of a government organization, but not a company the size of Expedia. If you're looking to work for a dynamic company where your work can have an immediate impact - look somewhere else.