In June I put a full set of PBR deluxes on our 735i and used them in a driver's school--worked fine and less dust at the end of the day than one or two days' worth of normal driving with the OEM Benz pads. Last month put PBRs on the Benz--there might be a difference in stopping, but I would want it documented scientifically, because it isn't noticeable enough for me to really say. They squeal a teeny bit once in a while, but I don't care about that as much as saying bye-bye to all that dust. I made sure I used the MB grease carefully on the pads as per instructions.

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TomO
94 E320 Wagon, 170k, totalled in 2006
2002 BMW 525i Wagon, 75k
1991 BMW 318is (two of 'em)