Pros
They will hire just about anybody - no college degree or straight out of college. You think you're hot stuff when you first get a job at Zimmerman. It will take about 3 months for reality to set in when you can't pay your bills and realize it's the worst company you'll ever work for.
Cons
Horrible pay, long hours, no company morale, UNREAL turnover rate. It's least creative agency imaginable. They are all about cranking out as many ads in the least amount of time possible. I'm sure creative people work there, but none of them work in management so it doesn't matter. The second you get to know your coworker they will quit, and the cycle continues until you quit. Average time at Zimmerman is less than a year. I couldn't wait to get out of there. Every interviewer I had elsewhere couldn't believe I lasted there over 2 years.