Former consultant here, just wanting to say that I know not to use soap on my stoneware but I do. Actually we use a dishcloth that has been used to was dishes, wringing the soapy water out very well and washing the stoneware under very hot running water. By washing it under the running water the soap doesn't sit on the stone therefore it doesn't get "soaked up". We have done this for years and haven't tasted any soap yet.
Also, making a paste of baking soda and water, rubbing it in a circular motion onto the stoneware piece and then rinsing it well, will remove any sticky residue left by food.
Things take longer to bake on stoneware due to the density of the stone. It takes longer for the stone to "heat up" before the baking begins. Also, remember that if you bake the rising crust type of pizza, you should allow it to thaw for approx. 30 before placing it on the stone. The pizza is so dense that it might cause the stone to crack if placed directly on the stone and into the oven.