I know there was a little bit of discussion about these strings a while back, but nothing too in-depth. If you are not familiar, Killer City Guitars is a company on Amazon and now Reverb selling bass string sets at probably the lowest price I've ever seen. I decided to give a set a whirl since I didn't have much to lose. I ordered a five-string set. I was excited when they arrived. But wait, there was an issue. The pack came with two E strings but no B. NOOOOO!!!!!!!!!! This stuff happens, and I've always worried about it occurring with the brands that have been around forever. I contacted the proprietor, William, about the issue and he responded right away, apologizing and saying he was sending a replacement out in the mail first thing the following morning. He also told me I could offer $1 on anything in his shop and he would honor it as well. I didn't take him up on that, but that was very cool. He actually sent two new sets and both have the B strings. I also had a new single bulk-bought B string lying around, so I essentially got three new sets of strings. So how are the strings? Overall, I dig them so far. They intonate very well, hold tune, have great output, and are very well tonally balanced. Prosteels are my go-to roundwounds. The KCG aren't quite that bright, but they have a good amount of zing and articulation. I'd probably put them somewhere between Ernie Ball Slinkies and DR Sunbeams: A bit brighter than the former and a little mellower than that latter. I think I'll be using the bass I strung up later this weekend for a one-set gig. It will be nice to see how long these strings hold tone; even if it's average compared to the big brands, it's a pure winner. William and KCG are still pretty new on the scene. He appears to be expanding with some different gauge options. I don't know what he has in store, but it would really be cool to see the lineup get expanded to flats and 35" scale offerings!