Vantaggi
Depending on the team, you can have a varied tech stack to work with which can be pretty fun. They also do seem to care about work life balance, and encourage taking time off.
Svantaggi
In regards to positions that require an active security clearance, Workday lied about what was sold as a yearly clearance pay for holding and maintaining the clearance. Instead, it turned into something that "we absolutely do not have the budget for, but if employees work really hard then we might see about getting it to them next year if we think they deserve it". As a result, this ended up being a 15% pay deduction from what we were told. Workday acts like a collection of companies, with each team having its own hierarchy and bureaucracy to deal with. And you generally need to interact with other teams quite a bit.