I believe that reviews, especially "verified" ones that can only be left by customers or other association (ex: investor / vendor / etc) are critical to help get someone over the hurdle of making a request.

Think about making the decision to rent a movie, what do you want to see to ensure you're not making a bad decision?

This is especially true for less concrete service like general contractors, etc - since there's no fixed unit of the transaction you can curate for (ex: Uber drivers, Airbnb listings).

Always up for a call if need be.