I love practical, useful projects like this. As an old guy for whom plumbing has become an important part of life, I'd love to have a cabinet to keep my Rx'd items in a closed cabinet above the commode. This is a nice start, just put in a face frame and doors. I have a wonderful watercolor of an elegant European arboretum that I might put on the inside of a glass door. Definitely the wrong location for a mirror.
Might be even nicer to set into the wall as long as there's no plumbing in the way. That would have the cabinet stand maybe 3-4 inches off the drywall. Just thinking.