I can't compare these to others but they do squeal loudly under hard braking when new. They provide enough braking, so I learned to rear-bias braking force and minimize the noise. The rear didn't seem to squeal as much anyway. As they wore to the limits, they braked better with less noise. They're on Dura-Ace 9000 brakes which have no adjustment for toe-in. You might get some conical bushings and try toe-in, but then they might wear faster to the limit line at the inward point. I recommend letting them bed in using the brake alignment as-is (near parallel).
Had a lot of brake squeal at first, but once I did a better toe-in as per Enve, rarely get a few squeaks now. These Enve wheels with the textured brake track slow down so much better than my old wheels with the smooth brake track. Pads wear about normal for carbon wheel pads.
I ride almost daily and over one month did 27 rides, about 900 miles of hilly back roads and over 51,000 feet of climbing and descending. I have to de-glaze the break pad faces weekly. They hold up, other secondary market pads just melt on the ENVE carbon rims, so you have to have these to safely ride with ENVE carbon rim wheels with the textured brake surface. It's a high maintenance brake pad but you have to do it or you don't stop and no one will ride with you because you brakes squeal so bad is you don't de-glaze them with a file or course sand paper and wire brush.