Our DIY videos and supplies have been purchased and used by many customers, all with great results! If you have any questions about your installation, please contact us with specific questions. We will be glad to advise you with technical support at no charge. If you have questions about which videos you need for your installation, please ask before making your purchase. We do not accept returns on the DVDs or supplies. (we do give refunds on anything that has not shipped yet) Thank you for your understanding. We look forward to working with you to create your very own ARTfloor or counter top.