have used k-c brains before with terrible results,strains were very unstable.but k-2 from nirvana i have only just grew,out of ten seeds ended up with onlt three female!! but three very good females one keept as a mother and flowerd the other two,both gave me a great smoke and massive yields.i would stay away from k-c,but recently have noticed that nirvana strains are becoming more and more unstable,i can recomend paradise seeds never had a problem,high germination rates and above average amount of females,good luck with your k-2great choise :thumbsup: