I had BB5's on my bike when I bought it and they were very noisy and I never felt they had enough bite for me so I upgraded to BB7's about 3 years ago. I was riding 40-100 miles a week at LHP back then and I couldn't be happier with my choice. They have never failed me and have needed nothing thus far.
That being said I repurposed the BB5's on my neighbors bike. It took me a while but it turned out the cleansweep rotors that came with them were what was making the noise, after replacing them and the pads everything seemed to work great. My wife's bike came with tektro brakes that are almost the same as the BB5's and have similar small pads. I'm having an issue with both bikes from time to time. After riding the other day they both said there rear brakes weren't doing much and there front brakes felt a little soft. This happened several times a while back when we were riding often.
My solution was to take the pads out, wash them with acetone, sand them flat with 220 until they looked brand new, rinse them again with acetone and let them dry. I also buffed the rotors with emery cloth and cleaned them, then wearing gloves I reassembled everything. They would work like new then for a month or 3 then they would start to fade again. When I would take the pads off they looked dark and glazed. Can anyone tell me why this keeps happening? And why it doesn't happen to my BB7's?