Pros
The company has good processes in place but not so many as to be overly cumbersome. The technology/products are exciting and management allows a fair amount of independence in executing to targets. The company is small enough that one individual can still make a large impact, great if you need your contributions to have real meaning. It is large enough that there is room for career growth and upward mobility for those who desire it.
Cons
As a US-based arm of Oxford Instruments, there are the typical challenges associated with the company headquarters and in some cases your direct supervisor located half a world away. Oxford has invested in modern technology to close the gap, although the communications will never fully reach the same level as when all are working from the same site.