we've implemented the module in our store, but google have sent us the following info as to why they won't be displaying rich snippets:
Thank you for your interest in rich snippets for your website.
because of the following issue(s):
1. HIDDEN MARKUPS
Your content is marked up for rich snippets, but that content isn’t
actually visible on the page itself. In general, Google won't display
any content in rich snippets that human visitors can’t see.
Here’s an example of the hidden content we found on your site:
Markup Type:Shopping
Hidden content: <div property="gr:name" content="Napier" xml:lang="en">
<div property="v:count" datatype="xsd:string" content="37">
2a. MISSING REQUIRED MARKUP
Some of your content is marked up for rich snippets, but other
required content on your site isn't marked up. Google needs certain
data to generate a rich snippet preview for each product type. For
more information, see this Webmaster Tools Help article
Here’s an example of content we found on your site that should be marked up:
Content required to be marked up: Count.
Markup Type :Shopping
Once you have fixed your markup, run your pages through the rich
snippets testing tool
errors. When you’re all set, use the rich snippets submission form
to resubmit your site.
Thanks again,
Google Rich Snippets Team