this module is very user friendly and easy to configure
Added new zoom type "Slider Zoom" in option
When pruchasing this extension they don't tell you clearly that you need to buy the plugin as well if you wish to use it in a Virtuemart based site. They show a long list of extension that they sale and the module is rihgt near the top of the list. This entry of the extension on the JED is for a module, there is no mention of a plugin anywhere on the JED or on this listing for this module for it's use in Virtuemart.
My only suggestion is that if you plan to use this extension for Virtuemart be prepared to buy both the module and the plugin. They are sold separately. They are not very expensive, that's not the issue by any means it's that it is not conveyed very clearly that you need to buy the plugin and the module to use it in Virtuemart.
I have suggested to the developer to mention it on the JED and maybe even offer a bundle package just for this extension for anyone buying it for use in their Virtuemart site. I hope they take the time to put these steps in to action. The extension works right out of the box with little to no effort. Had it not of cost me over six hours worth of hunting for an answer I would have given it a 5 star rating.
My only critism is that they have no language files so the Move mouse over image text is across all languages. I patched the zoom.php to replace text with a magnify graphic.