Pros
It wasn't all bad: Some of the people I worked with were nice. There were multiple microwaves in the breakroom, and the departmental Christmas parties were fun. The current CEO was not the CEO when I worked here, but he did work there and he was excellent.
Cons
There was no room to move up at this company. I was there for 4 years and in that time, despite excellent job performance and even taking on the slack of other coworkers, I was never offered a promotion, was ridiculed because of my age, and felt no investment in me as an employee. I was never offered professional development, never offered an opportunity to leave the office for any field work or enrichment, not paid as much as my fellow department coworkers who did not get as much work done. But other than those things, my contributions were not valued or appreciated and eventually I had to leave for the sake of my career advancement. There were opportunities offered to others my age that were just out of college, and most who had not been there as long as I had, but no one gave me the opportunity to prove my worth or skills.