I purchased 320 sq ft of shaw versalock flooring. this flooring would not lie down evenly as its locking system was defective. I proved this to be true by use of a micrometer and shaws own installation expert concurred with me that there is a problem with the flooring. I followed the instructions carefully. both sets. as there are two different sets of instructions with the flooring and yet a third on their website. shaws tech help line is useless and told me to put furniture on top of the imperfections to hide it. shaws ultimate position on this problem was "tough, you bought it, its yours".