Knowing your product is not the same thing as knowing what information is required to make people want it. Find out what approach and criteria your customers used in the decision process, what they were looking for, what got them interested, what product features you thought were trivial they thought were important, what were their qualms and what finally put them to rest, what materials were useful, how they compared the alternatives, how they tested or tried, etc. You especially want to discover what confused, annoyed or frustrated them. By discovering what decision stage your good customers were in when they got confused, annoyed, frustrated or otherwise slowed down, you can provide the right information in the right form to the new prospects in the right sequence. The sequence and form of the information are often more important than content.
Sequence is often more important than anything.
They won't be ecstatic before you've given them ways to personally verify that it exceeds their expectations. They won't know that it exceeds their expectations before you've provided support for them to expand their use. You can't expect them to expand their use beyond trial until you've trained them to have proficiency with and have confidence in your support. They won't have confidence before you've given them just the right trial with just the right risk reduction or guarantee. They won't try before you've given them clear criteria with which to evaluate.