A local shop had a set of brand new E46 M3 brake calipers sitting on the floor and they asked me if I wanted them on my 99 M3. He gave me a price that I couldn't refuse so I said what the heck since I needed new brake pads anyways. I just had them installed and I am braking in the new pads. Has anyone had any problems with this setup? I did not get a chance to do much review on this upgrade and I took a leap of faith. Any helpful info would be great. I am running e36 M3 Euro floating rotors with M Contour wheels (1999). So far so good. They really grip but I would like to know if I should be aware of any problems down the line.