Walmart is selling a $238 full-size memory foam mattress for $128, and shoppers say 'it's like floating on a cloud'

TheStreet aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. If there's one lesson I can relay to shopping enthusiasts, it's this: the products that change your life are never the ones you have on your wish list. Few people…