Pros
They're too large of a company to keep a close eye on you, so at least you can mostly do your work for your client.
Cons
The prior company I worked for was bought by Cognizant during the pandemic. It took Cognizant several years to on-board us, and when they finally did, they considered us "new employees" despite how long we'd been with our previous company. Because of this, we had no banked PTO at the start, and any progress towards job promotions were now irrelevant. Company makes no effort to assist you in finding your next project. They instruct you to apply through their internal job portal, as if you're applying for an external job anyways. Some random workers do submit project leads on your behalf, but I'm convinced they just do this to meet quotas because none of the jobs even remotely match your listed skill sets. They only reach out to you when they actively need something, and often it's to tell you that your just assigned learning task is due tomorrow. Even then your name is but 1 of hundreds in the included excel doc. They're primarily based in India, so email communications and meeting invites tend to be sent around 3 AM.