As a graphic designer, I've created and produced a lot of packaging, which I normally render for my portfolio with Photoshop. The only problem with this method is that it's time-consuming and can be a bit difficult getting all of the renderings consistent with angle and lighting.
This application seems to work pretty well, although it was a bit irritating to have to import the same dieline in three times, once for each visible surface; plus the open file dialog window didn't remember the last location, making me have to navigate back to my portfolio folder each time.
I also couldn't find any way to set defaults, so that I could save a few standard different angle/lighting/shadow settings for different uses.
Although it seems to be a good application, I can't see spending $80 for it as I would only need to use it occasionally.
Also, I'm not sure what "shareware" means anymore, since one has to purchase the application to get it out of demo mode. Wouldn't "demoware" or "commercial" be a better category?