Pros: Arm offers various career trajectories for hardware and systems-y software specialists. There's no shortage of exciting projects to work on. Compensation attracts talent. Colleagues are wonderful and internal politics is sensible (although that might be more of a subjective/privileged perspective). The general culture is no-bullshit long-term focus on work and IMO is mindful of not burning the talent out.

Cons: The main campus is in Cambridge, and living there is not everyone's cup of tea.

Pros: Opportunity for flexibility and growth within company. Salary temporarily elevated due to stock IPO.

Cons: There is nothing major to be noted.

Pros: It is a nice company to work for.

Cons: Nothing I can think of.