Pros
None. Unless you enjoy having no boundaries or being unable to disconnect (6, 7, 8 p.m. meetings; 9, 10 p.m. phone calls; working through 'global recharge days'; working on weekends/holidays/vacations). As an added benefit, the company's leadership will constantly give lip-service to "work-life" balance without enacting any real change to company culture to actually allow you to have balance with your life outside of work.
Cons
See above. "Work-life balance" is not a phrase that exists in the company's or its leadership's vocabulary. By way of example, as one VP said regarding asking a subordinate to work during off-hours/company down-time/weekend "...if they don't like it, they can get another job." The job is life...to many. Similarly, the lack of infrastructure for a company that has been in existence for nearly 30 years is mind-boggling. There are seemingly no processes for routine things, or if there are, there has been so much churn that nobody knows what they are....you are constantly reinventing things on-the-fly.