These are my favorite pads that I've used so far. My bike came with Formula organic pads. With those, my brakes would howl something fierce every time I was on a dusty trail (and I live in Utah, so that was basically every ride). I bought the SwissStop organic pads after the original pads wore out and I experienced the same problem! That's in the past now that I've switched to these sintered pads. They make a little bit of noise when they're cold, but they're fine once I've been riding a little. Also, it's never that terrible howling that I could feel through my whole body.