My theme was not working properly with woocommerce, the sidebar was shifted to the bottom of the page. So I followed your very simple instructions (thank you) using the less technical of the two approaches by using woocommerce.php over page.php and the sidebar is fixed.
But what I want to do is change the template used for that page. I want to go with a full page and NOT using the sidebar. I see some pages I can change it like cart which I did change. But I can't find the product page to change the default template. Is there a work around to change the template on the product page?
An example can be found here - http://pet-sling.com/product/baby-dots/?added-to-cart=833