The WP e-Commerce plugin is an impressive and ambitious piece of software. However, as with any ambitious software project, bugs will occasionally rear their ugly heads and certain releases will undoubtedly be better than others. Without a doubt, the developers at Instinct should be commended for their hard work in creating the WP e-Commerce plugin, and especially for releasing a version that is completely free.
That said, your humble author believes that we all benefit from choice and competition, and there's more than one e-commerce plugin in town that can integrate with WordPress. While we believe strongly in the long-term viability of the WP e-Commerce plugin, we think it is right to let budding shop owners know about competing software products.
There are several competing software programs worth mentioning. The majority of them are free (or at least offer a free version in addition to a paid upgrade), but a couple of them cost money. All of...