I had the elliptical stylus and later replaced it with - I think - the MR (but it could haven been the hyper elliptical). The update was a real improvement with a sweeter and more detailed sound. It was an excellent cartridge, but required precisely matched capacitive loading. At the time, Quad made special inputs boards for them, to match loading and output level. Tracking even at low pressure was exemplary, frequency response (if loaded correctly) was very flat, and distortion was low. However, the expert opinion (including that of Shure itself) seems to be that these days no original stylus assembly can still be in good working order - it will have dried out.