I have commented about EasyStore a couple of times. In my opinion EasyStore will easily become a leading e-commerce extension for joomla. It is way more simple than all the other options and way more straigh-forward as well. BUT for me it is something between alpha and beta versions seriously and need a lot more work on it. Features:

• Similar/Related product To be able to associate products with a product so that when opened for Product View to have a list at the bottom for example with the related products or something like - People who buy this also like/buy this. This prompt may pop up also when adding the product to the basket.
• Merchants - I don't know if this feature is in but to be able to have more than one seller in the shop.
• Brands - To be able to create brands and associate products with them
• One product to be able to be associated with more than one categories

Tweek: Upon creating product from scartch - the product is not yet saved - you add variants with description and images press apply and they are recorded. When you try to save the product but you have not selected the category of the product an error will appear that a category must be chosen. All of this is normal but even if you have applied the variants and the photos the page will refresh and they will be lost so that you have to add them from scratch once more. If possible fix this.