Like many other apps before it, Shiny Soap aims to help remove unwanted clutter on your Mac; as it scans your computer, water fills an amusingly skeuomorphic washing machine. When that cycle is done, the app sorts your files into three categories: "junk files" (cache files and logs), "leftovers" (old files left behind by previously removed applications), and unused apps (programs you haven't used for several months' time). Shiny Soap then offers to delete those unwanted files--though once you do, the app cautions that they're gone forever.
Shiny Soap's booth representatives were nice enough, and the app's UI seemed certainly--ahem--shiny during the demonstration, but I had little luck installing the application back on my own laptop. Between the Installation failed messages and Shinysoft's decision to sell directly rather than via the Mac App Store, I'm happy continuing to use DaisyDisk for my file-cleaning needs.
But I give the company props for booth design, all the same.