Did some research on this product and found it's basically what another online HBS sells as a HopShot. Did my research to calculate IBUs and actually found that 20 ml per 10 gallons boiled for 60 minutes gives me amount 60 IBUs. Taste test confirmed as about right. I ordered syringes off of eBay, put the tin can in a pan with hot water and filled the syringes with 10 ml of extract. Extract is like tar unless slightly heated. Really adds a unique hop character to my IPAs. Lots of flavor comes through. I tried adding later in the boil and wasn't as impressed. For my recipes I add the hop extract at 60 minutes and traditional leaf or pellet hops at 5 minutes, flame out, and dry hopping.