Yes! People have recommended me to read it.

I think I followed the approach the author recommended, unless I'm mistaken. I didn't build anything before I had that initial conversation with the potential customer. And the fact that he didn't say "yes please help me" made me realize the solution wouldn't be that useful.

In a way, I'm happy I realized it early on. It's just that I can't think of anything better at the moment ^_^