I have them on several of my bikes as original equipment. I imagine the discontent is the combo of
centerpulls/old dried shoes/steel rims. On my Supersport I have the wheels trued(alloy), koolstop gray shoes, and lined housings. Get the play out of the cables and add koolstops, and the braking feel is awesome. It feels like the brakes on a car! Super firm, releases when you release, and however hard you squeeze is how fast you stop. It also helps to tear the brakes down to the basic parts, grease the pivots, etc. If they still squeal, set the toe in with a crescent wrench. Sounds crude, but it really works. You can't bend them back and forth over and over, so be careful and go slow. To set the tension I tie wrap the brakes against the rim, pull the cable taut, and tighten. 9 times out of ten, the shoes are the correct distance from the rim once the tie wrap is cut off. Sometimes it requires a bit of adjustment one way or the other(Your mileage may vary),,,,BD