Guitar it's in : Carvin DC727C replaced stock neck pickup (which BTW wasn't bad, much better than the stock bridge.) This pickup was much easier to dial in than the Nailbomb was at the bridge. The ColdSweat seems to sound good at any given height and has officially become my favorite neck pickup. The easiset way I can describe the tone I get out of this pickup is to say "Take the best tones from a Duncan 59,and the Best tones from a Duncan Jazz and blend them together." This pickup is chimey and clear but not overly bright , and can get nice and thick if you throw more gain at it or bring it up closer to the strings. I was going for a Vinnie Moore , Yngwie -ish type of neck tone for leads and I dialed it in and it delivers. This pickup also sounds amazing clean and tapped. I love the Jazz but sometimes it's overly bright and I love the 59 neck pickup but sometimes it's a little dull. The ColdSweat takes the best from both and puts out beautiful singing tone. The NailBomb + ColdSweat combo makes for a very versatile H/H combination that will cover just about any style you need it to. I've been a Duncan guy my whole life as I love the JB, Sh-5 and the 59/Jazz but I feel these BK's take it up a notch and deliver great tone and add character to the guitars that they go into. As I said in my other review, the only down side to these is cost. If I could get them for the same cost as Duncans, all of my guitars would have them in there.