I'm loving them so far! and hard to beat at this price, but if you are looking for something more "bassy" these are probably not for you.
A more V-shaped sounds. Strong Bass. Good for EDM and bassheads. Highs are little harsh to me. Must be tamed with EQ. Mids natural but little recessed. A Classical mainstream sounding IEM. Very comfortable and light. BL01 and BL03 iare smoother and better to me. But if you look for punchy and dynamic sound, KS2 is a very fun IEM with very clean and detailled sound. I recommend it.