Pros
My direct team is first class—I really don't think there's another company with a stronger department than ours. As a result, my colleagues are incredibly innovative, collaborative, and fun. I learn something new every day, and my manager is an incredible advocate on my behalf. I see Twitter's core values acted upon frequently, and I really believe the company operates with incredible integrity. The compensation and perks are wonderful—and though my work/life balance occasionally teeters against my favor—my workload is generally respected. I am incredibly optimistic about our future—and I strongly believe I can be at Twitter for a long time, as inter-department and office transfer is strongly supported. Leadership constantly stresses the importance of the employees—their contributions are highlighted, and I get the sense that our satisfaction is paramount. It's really easy to do your best work here.
Cons
I feel like any "cons" at Twitter are nit-picking. As the company grows, it's harder to find the information you need (though they're working on that), or the people with whom you need to speak. The rapid pace of the business means we make mistakes that we don't always own up to externally, even though we'd like to. Internal critiques can be occasionally be brutal, and externally we're an easy target for the media (it can be tough to ignore). Engineering and Product teams seem to have a less positive experience than those in the Revenue group, though I'm really hopeful that will change now that leadership is secure.