Features:

• Evenly disperses heat from gas burners
• Saves energy
• Prevents scorching
• Coated for easy cleanup

Editor Reviews:

Product Description:
Excessive heat from your burner can scorch your cookware and your food, making it difficult to simmer stews and sauces or melt chocolate. This heavyweight disk absorbs the heat and distributes it gently and evenly. Made especially for gas burners, it also stabilizes oversized cookware on your burner. Made in Switzerland.

Rating : - This is a Must have
This is one of those must have's..

I have big to medium burners on my stove, (gas) when I want something to simmer just a little for a long time, this is a must.
It keeps my soups, stews etc. from burning. gives a more even heat, and I have Calphalon commercial cookware.
It keeps my stove cleaner, from foods that might boil over, or splatter.

If you have a stove with smaller burners, the flame will spread out farther underneath for a more even cooking.

This one says it's non-stick, which looks better then what I have!
I bought mine at William Sonoma, and Calphalon only makes it for them.
But mine is the same size, same price.
Years ago I had one that was a smaller size, and cast iron, this one is bigger and more even heat.

Just remember when using this, it will take a bit longer to heat up your pots, and do not touch it with out using a pot holder.
It stays HOT for a long time.