I Have an ecommerce site hosted on volusion and they make the structure /category/product (Specifically www.example.com/shortnameurl/productcode"). I figure with 10000+ sites they have found that this structure is best. They want the best results for their clients so they retain & gain new busines.
I recently tried to duplicate(ish) the product name like /black-luxium-camera/luxiumfz200 ... and google killed me.
My suggestion, stick with /categoryORbrand/product, NOT .com/product/ as there is more opportunity to stand out when people search.