Pros
Calix has always been the type of company that thinks "outside the box" in terms of systems innovation and investing in people and they aren't changing anytime soon. There are endless opportunities for both vertical and lateral career growth as Calix fully supports everyone's desire to improve themselves whether it be a new opportunity within Calix or even elsewhere. Additionally, the people that make up Calix are some of the most intelligent, committed (to doing the right thing every time) and friendly folks that you will meet during your career.
Cons
Nothing significant. When the occasional / minor issue comes up, it is typically handled in quick fashion through effective communication channels that are an essential piece of the culture here at Calix.