You typically don't have to interact with Brillio much; 99% of the time, I just work with the vendor company.
Cons
HR regularly requires vague, useless reviews and assigns mandatory trainings that are out-of-touch at best. Additionally, you have to access the company email through a windows VM; a drawn out process involving several MFA authentications just to check email. IT support rarely picks up unless you manage to escalate it with your manager/HR somehow.