Pros
Pay is a bit higher than the local industry average. Some of the managers are great and care about their employees.
Cons
Benefits are mediocre at best. High deductible health plan, vision is not accepted many places, dental is fine. The PTO policy is wack, it takes 3 years to get an extra week of vacation, then 20 years to get your next vacation increase. The only good part of their benefits package is the unlimited sick leave, but most people don't use this due to the overall hustle culture. A lot of the people that "excel" at CGI will work while laid up in their bed if they're able to physically do so, which is not conducive to a healthy and sustainable work environment. They give only the bare minimum holidays off, and the clients give significantly more to their own employees, so you're either working while half of your team is given the day off or you're using your meager floating holidays or limited PTO days to take the day off with them.
Leadership has explicitly said they do not believe in a work life balance.
In order to get a promotion or anything more than "meets expectations" you have to do work outside of your billable client work, and it's a toss up on if you can bill admin for any of this work, so it's often unpaid work.