Review on Hario Slow Drip Coffee Brewer 780ml: The Clear Choice for Flavorful Coffee Perfection by Jim Ball

The design of this product is so imperfect that it is practically useless. In addition, the manufacturer is completely unresponsive and apparently unwilling to support their product. A particular problem I have with each use is that the water flow drops from the recommended 2 drops to zero in 3 seconds in a very short time. Readjust the drip rate and the problem will appear again. This is probably due to the lack of sensitivity of the valve - the flow doesn't change beyond 70% of the valve's adjustment range, and once the flow starts to change there is micro-adjustment of the lever (i.e. so little that I can barely control it) results in disproportionately large flow adjustments. If you try to compensate for this by setting the initial speed above the recommended speed, the result is: a) the same as described, but slightly above the recommended speed; b) the bay when set high enough to complete the brewing process without readjustment; or c) a defective cup of coffee. There is an easy fix to this problem in the right valve design, but apparently Hario couldn't find that for their $260 product. If you are looking for a cold drip coffee brewing system, I would recommend purchasing a product from another manufacturer.