Has anyone used these liners for brooding?

[fastback1966]

I saw this on ebay under chicken nest box liners. The website is Nesturf.com and I talked to an old friend in California who said he has been using about a dozen of these turf liners over the last two years and says that he has had better luck getting his hens to brood on these liners. They look pretty soft on the ebay photos. I am personally getting tired of replacing bales of straw or pine shavings at $10.00 to $14.00 every couple of weeks. I have a large flock and wonder if these liners might be the answer. The website says that they have a one year replacement warranty and that you wash them off or soak them in hot water with dish soap if hard crusted. Anyway, anyone who has used these, can you give your opinion?
Thanks,
Dave