Pros
Kronos has a great work / life balance. This isn't to say that you don't work hard. There have been many times where I have put in 16 hour days. If you thrive on challenges and enjoy a collaborative work environment where everyone constantly looks for ways to exceed customer expectations, then Kronos is the place for you.
Cons
Kronos has trended over the past few years toward hiring people from outside the company for their management positions. In the current environment, it is difficult for employees to grow into management positions even if they have a significant amount of management experience in their past. If your focus is on being a contributor to the team rather than holding the reigns and driving the wagon train to the promised land, then you can do no better than Kronos.