Pluspunten
Easy work Some very good people work there. If you get put in the right department, you will have a good time. The problem is that that's a pretty big if.
Minpunten
Management can be a bit cold and hostile, depending on which department you are in. They fixate on your shortcomings and mistakes and ignore your successes. Work is not challenging. Co-ops are expendable. They hire 5x as many co-ops as they intend to hire for full-time. They also will attempt to underpay you severely unless you aggressively advocate for yourself (but that applies to a lot of companies, I suppose). Little opportunity for long-term advancement. They won't admit it, but they are in decline. The whole industry is slowing down, and they are being left behind.