This stone is fantastic for serious home bakers! I run a bread business from home, using a conventional oven, and this stone has improved the loaves that I sell by 100%. You don't need to treat it, just start baking with it. It arrived very quickly (delivery to UK from Germany) in excellent packaging, plus it includes a peel and a piece of wood shaped the same as the stone for pizzas. (Pizzas, by the way, are lovely cooked on this - but my emphasis is on bread!)
I used to bake my bread on a thin (approx 2cm thick) pizza stone, which was satisfactory but it often left the base of a loaf a bit 'doughy', but this stone has never failed in delivering a crusty loaf from top to bottom, cooked all the way through. Also, I can fit two loaves onto the stone at one time, by placing them at diagonals to each other, although I've had to master the peel in order to do this!
If you are thinking that 1 inch thickness is not enough, then think again. I wasn't sure and kept looking at 3 inch thick stones on other sites, (not sure how much room that would take up in my oven) but I'm very happy with this purchase and recommend it!