Instructions are incomplete, vague, and without explanation.
The theme install is asked to be done, you can't tell where you are suppose to put the theme zip file to install from. WP traditionally uses either an upload from the users local computer or from an Internet search. This plugin follows neither approach. Worse yet, it doesn't offer any explanation of where to put the theme file. For me, it didn't work from my local machine and there isn't any Internet search. So then we uploaded the zip file to an empty directory in our site and used that URL. The plugin loaded all its files and folders into the 'themes' folder. How Sloppy! No software author just throws files and folders into a general folder.
Then we tried the dropdown menu in the plugin and all it showed was the original theme we had on the site, and no listing for the new theme we were trying to edit. Worse yet, no docs to explain what the problem might be. This is just plain author laziness.
There are no docs, just a few incomplete "Installation Steps".
When users complained they couldn't get it to uninstall, the author suggested ftp'ing in and deleting the folder.