The original Virtuemart provides RSS feed to every product, so that users can “eat” the feed if they like the product. The idea is cool, but actually, I prefer an on-line favorite subscribe function for the user than RSS subscribe. The RSS subscription is good to track back to a single category or a whole website, not so good to track each product. How many chance you would like to change the product’s description or product’s price to let the users know the newest status of product? So your product categories and website will be renew every now and then, even everyday, but not a single product, right? So the single product is good to be traced on the website’s favorite function. Unfortunately, Virtuemart doesn’t come with such a function for people to trace their own favorite product. The favorite products mean the products are probationary, users don’t buy them, but could buy them later. So what I think the “Add to Favorite” function could be specified as:

1. It’s managable. User could easily add product to favorite list just a single click, better not refresh the page after they click a button.
2. User can review the favorite list. 
3. The product in the favorite list will be shown when the product is published.

I think this little gadget could help user shopping with happiness.