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).
After breaking a second Campy Record Carbon post in the past 5 years and given that they're pretty much unattainable, I decided it would be okay to defile my full Campy Colnago and I took the dive and went for the Enve post. Excellent fit and finish and stealth aesthetic. I've read complaints that it is difficult to adjust but I have to disagree completely. The dual wedge design is ingenious and all you need to do is get the seat tilt located approximately where you want it, tighten both wedge screws just enough to hold everything loosely together, and alternate tightening one wedge and then the other a little at a time to dial in the precise seat angle you want. No crawling around under the saddle to access bolts you can't see and can only wrench 14 turn at a time. Very well designed. I can't say I feel any difference in ride quality as it was a carbon to carbon swap. However, I also installed Enve Bar and Stem, replacing old school ITM aluminum and WOW! Huge difference in rigidity and ride feel with the carbon cockpit. Expensive kit but seems to be worth it.