Full set of Brembo discs and pads went on the S5 a couple of years/12k miles ago - easy to bed in and they're still working and looking spot on  added bonus was that with discount codes etc the full set of x4 discs and x2 sets of pads was only £250, with some change.
As mentioned earlier in this thread, there have been issues with ECP owning the UK rights to market products made cheaply in Asia, that were previously known for their Germanic/UK engineering. Some of these brands still exist in Europe (e.g. Pagid IIRC) and if the product is made in Germany it's actually still the good stuff. Not sure how much of an issue that still is - sounds like it's not entirely gone away.
On the question of pad to disc life with OEM, our S5 got through 2 sets of front pads before the original discs were too worn to be able to take a 3rd. The (original) rear discs were, in theory, still thick enough for just a pad change. Luckily I decided to change them anyway, as on removal the inner face was rusty as hell and the bells were looking very crusty.
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===SOLD===2002 Audi S8 D2 Final Edition (yes, really) in Avus Silver with purple extended leather===SOLD===
2011 S5 Sportback in Phantom Black with black Super Sports leather, 9x20s, tech pack high, adaptive xenon plus, intelligent key, memory seats pack, sunroof, B&O, Audi Drive Select & quattro Sports Diff, DAB, parking system plus
2015 VW Golf GTI Performance Pack in Carbon Grey with black Vienna leather, tech pack (Discovery Pro nav & Dynaudio), DCC, factory towbar and retrofit RVC
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