Have one and used it a few times. Planning on using Super Bowl weekend to sear wagyu meat.

Meats -- it works better with thinly sliced meats so you can sear them and the flavor of the salt is imparted to the meat. I have only used beef.

Fish -- only tuna so far. Not too thick or thin. Leaves a good flavor on the fish. I am sure shrimp would be good as would salmon.

Veggies -- would not do on the block. Did not pick up any flavor.

My feeling is that the fats from the meat or fish help pick top the flavor whereas in the vegetables, there is nothing to give the "sear".

Also, do not heat it up fast. Go slow otherwise it may crack on you.

Cleaning -- Half a lemon while it is still warm and the stuff will just wipe right off. No chemicals and definitely not in the dishwasher !!