We have had Thirsty Coasters in the past.  First, we especially like the natural sandstone look with the variances in striation.  Second, we like the absorption of moisture from the glasses -- no tray water dripping off the coaster to damage furniture finishes.  The reason for 4 Stars instead of 5 has only to do with Wayfair's Shipping Department -- one of the coasters arrived broken into 3 pieces, held together only by the cork on the bottom.  If that happens to you, Wayfair will happily replace broken merchandise; however, we ordered this set on 9/2/2019 and didn't actually have a complete order till 9/23/2019.