These sheets are very soft and the material seems to be good quality. Only been washed once, so I can't tell if they'll hold up over a long period of time.  Some of the stitching on the fitted sheet was loose and unraveling.  
Also,  I don't feel the "cool comfort" part of these sheets. I felt a bit warmer than with my old cotton sheets. Although these are much softer,   I'll likely go back to cotton.