[avalaunch]

I would advise not to iterate based off a single customer. Despite being a customer, I think there is still too great a chance that she isn't in the startup's target market. This goes 10x if the customer isn't a paying customer.

Otherwise, great advice.

[reach_kapil]

Sure, but single customer idea is mostly to give an idea of how to approach this problem. You are right about subjectively 1 customer should not determine the direction of product. Mostly don't ask for feedback to your closest friends and family