The stone uses what Emile Henry calls Flame ceramic, better known on the internet as Flameware. It's a thermal shock resistant/proof ceramic. It's often advertised as being stovetop safe, fine for taking a dish directly from the fridge to a preheated oven when used for baking dishes, or as a preheated makeshift cloche. It shouldn't have any issues with what you can do to it, and is definitely broiler safe.
My folks have had one of these for 3-4 years now, while they've had a few traditional baking stones crack on them, this ones been going strong. My only complaint are the carry handles, while useful for removing the stone, for me a stone is a static piece and doesn't need to be pulled out often, if at all. The handles limit the useful size of the sides of the stone since they pop up above the cooking surface, but it's still a great piece and even at full price it's better then most of the competition.