The benefit of stretch mark cream is that they force you to stimulate the area by rubbing which brings more blood to the area. Using any type of lotion will help just as much at the more expensive ones. They will really not ever go away, just fade.
I am not sure about the product you mentioned but I'm a huge fan of the Avon Anew Clinical Stretch Mark Smoother. It made such a huge difference for me. If you want to try it it is usually $25 but its on sale for only $12.50 right now www.youravon.com/dhullum