First, let me say that this is a great plugin. I spent too many hours fiddling with one that cost me twice as much, and whose support has a lower population than an old west ghost town, and less documentation than a Mission Impossible episode.
I am using this plugin to sell both some downloadable files and printed sheet music. The print music comes with options of score, parts, or score and parts, with differing prices for each option. Rather than set up 3 different products (tiresome), I am using the variations, which work great, with one small flaw (for me, anyway).
To make my pricing structure work, I have to use a base price of zero. No problem when I am using the simplest "add to cart" shortcode, as there is no base price display. But it means that whenever I try to use any fancy displays, I get a big fat "Price: $0.00" - which could be very confusing for my customers. I would LOVE LOVE LOVE a set of the various fancy shortcodes for product displays that exclude or turn off that base price display element.