Question about CoreTec brand of luxury vinyl plank flooring - seems to be a popular choice, I see it's name everywhere when reviewing vinyl plank flooring. Have even seen it on some "best" lists. When I went to a local flooring shop, who sell CoreTec, I was told by two people at two separate times there that the CoreTec brand (regardless of product line) is essentially a step above contractor grade. Seemed odd to me that they'd tell me this since 1, they sell it, and 2, I've read a number of reviews/write ups on LVP and CoreTec was never really referred to as a "cheap" or entry level product. Any insight?