Pros
Hard work pays off at McDonald's, and the benefits are great - especially the 401K. I've never met a harder working group of people. That applies to the people in the restaurants, as well as the staff in each of the regions. Imagine the challenges of tuning an engine that is running 24-7. That analogy applies to McDonald's - it's a system that never sleeps. But, everyone in McDonad's strives each day to do a better job than the day before. It isn't an easy task. But, it is a cornerstone of the culture.
Cons
We work extremely hard - the restaurants only close 2 days a year. It doesn't matter what your discipline is - it's challenging work. But, we're also the best in the industry. McDonald's is using technology more than it ever has, but it still has a long way to go before technology provides the benefits it has the potential to provide to the system.