I found the Recruiter I met her very helpful. He was genuinely interested in what I wanted from my next job and why I was moving. Agencies I've used in the past have only been interested in what I can do etc.
To prepare, I'd say be clear on what's important to you. What you do an don't want.
Really bad Agency. It's better found another.
Answered - Category Analyst (Former Employee) - Dublin 22