The Order Manager has incredibly robust features for a very low price point. The fact that it's open-source code makes it indefinitely flexible. This does everything needed for a typical e-commerce business or retail store.

Best bang for the buck complete e-commerce order management solution, hands down. The workflow and customizability are just not available at this price. I've used Stone Edge since 2007 in production and with my client accounts. Coupled with Quickbooks (local) it can run your entire e-commerce business completely and comprehensively with auto inventory reordering, bulk drop shipping, and automated order processing/printing. I still haven't come across an order management solution that was built so thoughtfully with a built-in roadmap for crawl, walk, run in regards to order processing. It has a built-in shipping service price shopper which helps keep fulfillment costs down and delivery on time.

I use STON for web cache. So I can see cache advantage. STON helps improve hit ratio.