This is a great coaching process; I had help hundreds of people to sell to new customers. Usually I was seating on their side participating as a support person for them, taking notes and watching how the conversation went. I always wanted to tape the conversation, but this was not done because requires the authorization of the customer, that do not know my role and less that my mentee was under training. I wonder if you make it as an open sales training session to disclose to the potential customer in the same way that a call center tell you about the recording of the conversation and you help your customers thru a website that create the sales feedback training process.

For me sound great a idea, that needs some work to find the best way to go.