Pros
The work is exciting, challenging, and cutting-edge. The employees are smart and great to work with. They publish research papers and open source code. They have a fantastic internship program to encourage collaboration with academia. They also have an In-house chef who cooks breakfast, lunch and dinner!
Cons
Hard to think of any cons - this really is a dream company to work for. Unless you hate robots and think that they might take over the world some day.