The prep was a few steps, but it wasn't too difficult. I used Love Patchwork and Quilting issue 6 for my instructions. I actually bought this issue specifically for the instructions.
(next to the doll quilt my great-grandmother made)
I have to say, I absolutely love my little mini. The binding took a moment to think over the how-to, but it turned out alright in the end. The main work was the prep, filling the windows really went pretty quickly.
(it's in a weird spot, I couldn't reach any higher and I just wanted to see it up there)
I think I could totally do a whole quilt of cathedral windows. Once I get over just how much fabric it would take, that is.