Mockups 101: Please Answer This ONE Question

I’m VERY close to finishing my book “Mockups 101: Help Your Customers Understand What They Are Going to Get.” I’ve been working on this for more than a year, but I’m finally going to wrap it up. I’ll be releasing it in early June.

This book will be entirely focused on using mockups as a way to agree on the functionality of a software system or website. It will include practical examples and real-life stories as well.

HOWEVER, I need your help. Before I finalise everything and send it off to the printer, I need to make sure I’ve covered everything. Please answer this super-short survey - there is really only one thing I want to ask you:

What are your two top questions about using mockups on software projects that I absolutely NEED to answer in the book?*