Overall, it was confusing. A complete waste of time, since I passed all technical interviews, but was not a fit for the team my recruiter picked for me.
Don't be fooled by the 'stack agnostic' statements, it's not true. There are very little teams willing to take on engineers with experience in other languages than Java.
Wish the recruiter was more transparent in what teams they need people for, and to get my input before proposing teams.