Jackhammer is an excellent beer. I bought the jackhammer kit as my second brew on the grainfather and it turned out awesome, now that I have done a few more brews I decided to try it again. I was going to just buy the ingredients separately but the cost of the brewdog kit came in at about ã2 over getting all the ingredients separately so just went with it to save on hassle (and found it with free postage so ended up costing less).
It was Punk IPA that got me onto good beers and I still (sort of) remember when I first tried it in the pub. For a long time I thought this was the best beer Id ever tasted, however now I am not too fussed by it. Im not sure if the beer has changed or my taste... its still good but nothing to get excited about. I still think that brewdog make some of the best tasting beers around, after the jackhammer Im planning and elvis juice with a big hit of grapefruit.