Unique GUI of this APP shows all of your products and variants in single spreadsheet. This kind of gives you feeling of power over the data. You don't open various pages to reach point where some data is edited, instead data is placed on single view, and to edit filed you just type in a value into cell. Metafields are one example where this interface has clear advantage. Filters allow you to find any product/variant in blink of second. App supports programable triggers and calculated fields.