Call me a complete nutter but I could have sworn I had some fake bosch ones when I got them from eBay, the box was slightly different to the GSF one, the ebay ones had the bosch stamp on but when I put them on the car they juddered and smeared right away.
The ebay seller refunded me instantly. The ones from GSF worked properly straight away.
Not sure if it was a bad batch or something, but something was not quite right.