Basically, a cool product. The coaster is stable and the pressure is very good. The surface is smooth and "paint-like", so you sometimes can over it evaded damp if necessary. The price of 4 is fürmich very borderline, especially since another 2 added for shipping. Betsellt to 2 coasters so you pay even 2x Shipping costs, therefore the per unit cost coaster 6. quite expensive, but you knew that before Betsellung.