No Preview products are designed for products with text personalisation only and as the name suggests allow you to personalise a product without a preview but still generate the artwork in the Order Management System
it won't load without a valid callback URL, which the Personalise-iT module will add automatically for Magento websites This will just display the text boxes in an iframe so they can be added to any webpage easily - you can also use the delayed preview option to pass the text to these fields from other websites without displaying
When the user clicks 'Add to Cart' it will create a print job as per normal. User text etc can then be viewed from the print manager. Artwork will also be generated as per normal if a corresponding order is created.