I know this is an old thread, but I thought I would update it with my experiences. I have used the isomerized hop extract a few times now and the suggestion to mix with vodka is really the best way to go. I put it into a shot glass with the vodka and add it that way. It does make the solution cloudy where it initially hits but that does go away after a day or two once it dilutes. The Arrogant Bastard clone I made was a huge success and the hop balance was right on target for what I was looking for. I have since moved to all grain and full boils, so I don't really need to use this anymore, but I can recommend it for extract brewers needing to increase their IBUs.