I worked at ARGO as my first full-time job after college. Approximately 75% of the development staff were also fresh out of college. The turnover rate at any given time was atrocious as people realized that they could get better pay and benefits at other companies.
Most of the time, working for ARGO was alright. My co-workers were friendly and helpful, and the work was mostly undemanding. Unless you work on a customer implementation, then prepare for ridiculous hours, unreasonable demands, and stupid, unfiltered requirements. I spent two months on a customer implementation working twelve hours a day, 7 days a week. There were people who had been on that implementation for a year on that schedule. Management demanded that each developer resolve 2 defects a day, regardless of defect complexity.
Working on one of the base product teams is much easier, much more relaxed. However, during my time at ARGO, the base product I worked on had been so neglected for so many years that it didn't even function. And this is what we sold to customers. By the time I left, it was approximately 75% functional, up from 10%.
In short, there are a lot of challenges, but if you can overcome them, ARGO is a fine place to work for a few years to get experience.