The WP e-Commerce Plugin was the worlds very first WordPress Shopping cart Plugin and helped attract over 200K users to WordPress (from zencart users etc). There are millions of people using WPEC to generate millions of dollars of revenue.
WPEC is a good piece of software and the team is committed to making it better and better. 2012 saw a very large portion of the code being overhauled to WordPress coding standards and we introduced a new premium support system for our customers and has resulted in many THOUSANDS of resolved threads and many happy customers.
The next release will see a new template engine, even more tidy code and some great new e-Commerce features.
The team is 100% committed to WPEC being the best Plugin for e-Commerce ever.