These sinks are poorly made and show no signs of any quality control in their manufacturing. The sinks are warped such that the front, top, or rear edges are visibly curved or not straight.  It almost looks as though they were taken out of the mold too soon, and as a result they sagged or warped excessively.  Note: Wayfair shipped us 3 sinks before we received one that was even close to acceptable.  We decided to keep the 3rd one, but if it doesn’t look right after we install it we will tear it out and shop for another brand.  No more Kohler!