I'm so happy with this sheet set.  First they are super soft and silky plus wrinkle resistant.  The 1200 thread count fabric washes and dries without any pilling.  With our extra deep mattress the stretch corners hug the mattress and keep the bottom sher smooth.  These sheet can fit a 7" all the way to an 18" deep mattress.  I am impressed how well these sheets fit, how comfortable they are and how easy to wash and dry.