Pros
Accenture is a global company, and for some reason that I can't really understand, it has a lot of prestigious clients in its portfolio. This is a good thing, because it will give you plenty of exposure to MUCH better places to work, and will allow you to shop for a new employer. Also, if you like the meaningless pursuit of activities such as drinking, partying and other "high school" level fun, you'll love ACN. Management truly believe that this is the only reward they need to supply you in exchange of the amazingly high amount of free overtime you'll be doing for them.
Cons
That's a funny question.... Let me be blunt: unless you're right out of college, away from any other better places to work, not interested in work-life balance and willing to give the company access to EVERY hour you have (including evenings and weekends), with poor benefits and incredibly incompetent managers, stay away from Accenture.