We've used it to great effect for hops in an all-grain boil (make sure to tie a knot on your kettle handle--if you just loop it, the bag might slip in and invalidate your efforts :) --not the fault of the bag) and we also used it for a 1-gal all-grain batch on the stove for recipe testing. It was a quick cleanout for the grain and then we put the hops in during the boil.
Great, sturdy bag. Make sure you don't burn or scorch it though. If you care for it the bag will last.