From my experience so far I like these bits, they are always sharp and cut well. I recently bought 2 orders from different sellers about 3 months apart and something seems to have changed. They almost look like they've been resharpened or cut too deep, making the compression point (the point where the top and bottom cuts meet) higher than in the past. This forces me to cut deeper on the first pass, resulting in a slower feed rate to prevent sticking and reduce wear on the bit. They're still doing their job well and I'll buy them again for now, but if the problem persists or gets worse I'll look into a new brand.