I have noticed some KT in almost every kit I have ever made. The strange thing is that I cannot isolate what it is i am smelling, but I can instantly recognize it. The cheaper the kit (usually the less the juice), the most KT I notice. High end kits have much less KT. Ageing them, putting in some barrel time, adding skins/actual grapes will reduces the KT. Juice buckets have less KT than kits. This is all my opinion and as previous people have mentioned some folk swear they cannot smell it... But I have come to these personal conclusions after making my first batch last year using fresh grapes (and with only mediocre grapes!) and for the first time that odd smell is completely absent (and it is still young). (Usual disclaimer about how others opinions will differ and how I in no way wish to put down kits as I still enjoy making kits, albeit less often, but I no longer have dreams of being able to make one without KT.)