The pay is barely enough to live on in most of the geographies, other than Texas, where it's plenty. They pretend like they put a lot of resources into learning and development for employees but it's all talk and no follow up. The benefits are average at best. Middle management is mediocre (just the people who weren't good enough to find a better job after 2-3 years) most of the time and upper management pretends to be accessible, but unless you're in NYC they aren't and only pretend to be transparent. They management pretends to be meritocratic in its focus on defined goals, but the goals are often unreasonable. Your experience will largely be a function of your team and your accounts rather than your own performance or capabilities. Even when they acknowledge that some accounts are more or less difficult to service than others they're unyielding on the promotion requirements and performance bonuses which horribly hypocritical.
I started out of the NYC HQ and, on day one, was issued a crappy, used Lenovo with no rubber feet left and a broken keyboard. That's how little respect they show to new junior employees. The rest of the experience has been basically more of the same in every other department.