Pros
I come into work early and leave work late, not because it's expected but because I enjoy the day-to-day work, projects I work on, and environment I work in. I work in a technical role and managers I work with are very technical minded, understand the problems that need to be solved, and provide the resources to solve the problems while also challenging the teams to find clever and efficient ways of completing the tasks. This can save money and also results in fulfilling work with interesting challenges to take on. Fair compensation and enjoyable working environment with lots of social perks. Minimal corporate bureaucracy.
Cons
Fast moving tech company with many technically minded managers is good in some areas but is a weakness in many other areas. There can be lack of communication between teams and groups, leading to overlapping toolsets, inefficient use of compute resources/hardware, and support teams such as Ops and IT support are left to figure out how to run things often with not much help.