This was great.  I made miso soup with it and it turned out wonderful just like at the sushi bar.  I simply added a couple of teaspoons to a pot of hot water and added my tofu and miso.  I will say however that I wish there were clearer directions on the water to stock ratio.  I just did it by taste and that worked out well enough.  Quality was great,  I was worried it would be too fishy tasting/smelling but it was very subtle and mild.  Put it in the fridge after opening.