This is a perfect simple replacement cable if for some reason you have an issue with the stock cable on one of your IEMs. The copper wire looks attractive, and the clear PVA outer layer feels nice to the touch. The metal fittings are well polished and neither look nor feel cheap. The cable holds its coil well—this may be a plus or minus depending on if you prefer something with more compliance, but I like it because it makes for tidy storage of IEMs. The input plug is narrow enough to fit into phone cases, which in my opinion is a must-have for any cable. You really can't do better than the Karen for $10.
Overall Satisfaction: 5/5
The only potential improvement I could suggest is that it would be nice to also have a flush 2-pin option so that the cable could pair better with IEMs like the Salnotes Zero or Kiwi Ears Cadenza. Also, a silver wire variant would be welcome purely from an aesthetic standpoint. But I understand that at this price point, you can't always have the luxury of choice.