I have that mat.... use it on my kitchen table which is wood. The first quilt I made I used it on top of my omni grid (it warped the grid!) Next time I double folded a towel...... worked well, but I like the idea of setting it on a plywood base or attaching it to an old tv tray!! You CAN RUIN the surface below if you do a lot of ironing without "cooling" time in between!!