Pros
A good place to quickly accumulate experiences by exposing yourself towards a wide variety of semiconductor packages and technologies, albeit most are well established and do not represent the forefront of technical innovations; most people, engineers and technicians, work their 8 hours a day with solid output; it's rare to see more than a few who are willing to work longer than 8 hours a day due to lack of incentives to do so; On Semiconductor is growing amid rising raw materials cost and lowering market demands, thanks to the relentless cost-saving measures which some viewed as negative and some viewed as positive.
Cons
ON Semiconductor heavily relies upon volume and low cost to generate revenue and profits; most people can understand the pressure to get quarter-to-quarter results however in the long run, the company may find itself squeezed to push the costs any lower; significant differences between different groups/BU, as some maintain and encourage positive working environments while others have to silently accept the negativity that's rampant at the workplace. So it's not rare to see some people working real hard while not being recognized accordingly, while others who are not producing much solid work getting rewarded.