Has anyone here used a travel agent? What was your experience like and what are the benefits of using a travel agent?

I've gotta be honest; the concept of hiring someone to book my travel arrangements for me always struck me as a little too rich for my blood. That said, I'm sure there are benefits. So I was wondering if anyone who has used a professional booker before could tell me what the experience is like.
Has anyone here used a travel agent? What was your experience like and what are the benefits of using a travel agent?
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