Nope, but a bunch of 987 drivers did at some point for the reasons you suggest. A lot of them reported: "awesome!", "totally transformed my brake pedal" "solid as a rock now".
My impression after driving hot laps in several of their cars vs mine with stock master cyl? It did not do what they wanted it to do. I noticed no significant difference between the two. I chalked-up the comments to confirmation bias. YMMV
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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