Pros
Compensation is competitive compared to other chemical companies, benefits are quite good, and work-life balance is very good. Workplace culture is competitive but not cut-throat, and most everyone is helpful and good to work with. Lots of resources are available for R&D work and there are plenty of experts around should you need to leverage expertise in your projects. Good support for IP fillings should you have patentable technologies come out of your research. Safety protocols are first in class.
Cons
Like other big companies, there is a process for everything, and it can be burdensome at times. Safety protocols are excellent at Dow, but at times can make progress quite difficult for lab researchers. Too much emphasis on growing project management and other soft skills, not enough emphasis on growing technical expertise.