PBR's for me
I have not replaced the brake pads on my Mercedes yet but when I do it will be with PBR.
I have always used PBR's on my Volvo's and they are dust-free and do not wear out the rotors like most metallic pads. I racked up 270k miles on a '75 Volvo and it still had the original rotors. The pads of course won't last that long but I would much rather replace pads than rotors.
The only down-side is that I believe they contain asbestos but I think that is also what makes them perform better.