I wasted $40k on a fantastic startup idea

> Make something people want. It's Y-Combinator's motto and a maxim of aspiring internet entrepreneurs. The idea is that if you build something truly awesome, you'll figure out a way to make some money off of it.

> So I built something people wanted. Consumers wanted it, doctors wanted it, I wanted it. Where did I go wrong?

There's a HIUUUGE difference between what people say they'll do and what they will actually do.

Yes. There's also a huge difference between what people want and what they are actually willing to pay for. I bet many of the people interviewd by the author would have be happy to use the product on occasion if it had been free.