I ordered two twin XL mattress covers.  When the package arrived, there was only one shipped.  I contacted Wayfair who immediately sent me another one express delivery with no added cost for me.  I think Wayfair offers outstanding products at very comparable prices, and provides A-1 service to their customers.  I will definitely continue to purchase goods from Wayfair and I recommend Wayfair to my friends as a source for great products, prices, and customer service.