It says Free everywhere but not true. I had to switch to VMart after using Ecwid for a couple of months... It turned out you have to purchase it for $17 a month if you need more than 100 products. Of course, after adding 100 products you will have to pay!
Very limited control over the catalog, ordering system, customer fields...
But, Rockettheme... Cannot say anything bad about them! Great service, products, support, and designs... All the best