They are who you should be listening to
How to Understand Which Features to Build Next

I agree totally. Yet we still have to keep in mind that survey and interview doesn’t work as well as serving a prototype. Many times people don’t even know what they want. Even if they say “I will use your product, that’ll really helps”, they might not use it in the end because they don’t have a clue as to the shape of the product.

Great aryicle BTW