Greenstuff really do arouse polarised opinions. My Roadster had been fitted with Greenstuff before I got it, so I had nothing to compare with, but they performed well on the road over a reasonable mileage, and did the business at the MOT.
When I changed to the Mulfab ventilated discs & Calipers, and used the Mintex pads which came with them, the performance was worse than the Greenstuff on standard discs. Even after 1,000 miles touring Scotland, initial bite was hopeless with an imbalance for the first few seconds until the heat got into the system. At the MoT, on the brake tester it was marginal, and had I not known the tester he might easily have failed it. Changing to Greenstuff transformed the braking. That's my personal experience.
I fitted them to my 2012 Plus 4 and again, no issues.
Oh and on a slightly related issue, I recently did a full brake change on my Golf. Discs and pads front and rear. At the front I fitted Brembo pads. What a revelation. After bedding in, these pads give incredible bite right from the start, without much pedal effort. If only Morgan brakes were anywhere near this!
