Before I made this addon, I would have to run up to two macros per character to configure my UI per class. I made this addon in order to free up macro slots and simplify my WoW experience. Instead of having a cluttered macro page, I now have to simply enter the command to run the addon or set it to run automatically.
I've uploaded my addon here both to have a backup of it for myself, but also so that others can have an example of a simple and personal UI addon that they can make into their own.