I cook alot and have tried many brands of fish sauce and this is by far my favourite - light and delicate and adds a subtle and rich element to many Thai, Vietnamese and other dishes.  Most other brands that I have tried are more overpowering and pungent and tend to dominate the dish rather than enhance (at least to my US taste buds).  Also tends not to accumulate too much of the sediment that accumulates in most bottles of fish sauce which is even more strong and pungent that the rest.  This also gets delivered very quickly and nicely and after buying half a dozen bottles or so, none have been broken.  Highly recommended.