My previous employer actually boycotted the Pagid brakes because we had repeated instances where after a couple hundred miles they would begin to squeal.
We complained to ECP who then sent down the pagid rep who kindly informed us that we were fitting them wrong? When we asked why it was then that we had no issue with any other brake manufacturer (which we fitted in exactly the same way) he had no sensible answers??
For the record we took great care when replacing brakes I.e thorough cleaning and lubrication of hub and carrier and also using the ECP recommended "cer-tec"