I love my Martelli mats. I have 3 of the 30x60 and have covered my pong-pong table with them. I also put the ping pong table on bed risers to get it to a good height for me. I have 2 of their other smaller mats that fit on my craft table.
Get on their mailing list. The send out discount coupons throughout the year, ranging from 15% to 25% to the rare 50%. The are pricey but worth the cost. They won't curl or warp and you can even iron them.