Pros
Not too many. The support staff in the Chicago office is comprised of very nice people. They are all underappreciated and treated terribly by most partners, though. However, I hear that the Florida offices are great places to work.
Cons
Everything under the sun. To name a few, they are extremely cheap, it is a billable hour sweatshop, absolutely no room for growth, no cross-pollination, you'll be pigeon-holed in a practice group. The "LARGEST" minority-owned law firm with very, very few minority associates (if any). The place is a revolving door. You aren't compensated for your hard work. No matter how many hours you bill, you raise will be 3% of your annual salary, and your holiday bonus is 1-weeks pay. From what I understand, most first year associates make $50,000/ year, 12k less than most DA offices.