I'm familiar working with virtue mart before. Than I started looking for new e-commerce solution because there is no photo gallery provided by virtue mart unlike Tienda, good job. After some testing and benchmarking, I found a little bug. The order will be save on review page. So, if customer decide to cancel the order on review order page, it still appear on "My Order History" page. I tried couple times to fix it, but without success.
Other than that little bug that keep bothering me, nice job Tienda!