Prós
Great experience for junior lawyers because there's a lot of work to go around. Very junior lawyers can find themselves taking and defending important depositions and serving as second chairs at trial. Firm is flexible with respect to working from home because office space is at a premium.
Contras
Compensation is well below-market, turnover is high, benefits are lackluster, and the firm is "cheap." There are far too few associates. There are three rungs of partners: Office Partners (partners in name only for marketing purposes, and the vast majority), non-proprietary partners (non-equity), and proprietary partners (equity partners). Despite having over 1200 attorneys, there are fewer than 100 equity partners. As a result, opportunities for partnership advancement are limited. Because there are so many offices, culture really depends on a given office. Billing restrictions for insurance clients are terrible. A lot of travel isn't billable, internal meetings and communications relating to a case aren't billable, etc. Insurance carriers seem to want lawyers for pennies. My mechanic charges more.