I was intrigued when I heard that Lulu had created a Shopify app that allows publishers to accept single, print-on-demand orders through their own web sites.
I spent some time and money setting up and ordering samples of several titles. To save others the trouble of conducting similar experiments I shared the results in this, my first YouTube video:
The short answer is that all of the matte covers were badly curled — absolutely unsaleable. I uninstalled the Lulu xPress app in Shopify and will sticking with my current printer.