Just spent the day messing with my brake pads (Alfa 156 JTD 16v, 2004).
The car has 20k on it and i've recently noticed a grind coming from the front when braking at low speeds. Went to my local spares shop who got me a set of "Mid market" pads - QH brand.
Took off the old pads which were hardly worn (Bosch pads), but I do have a lip on the edge of the disks.
When I put the new pads in, the pad area is slightly bigger than my own, so the who pad was not making contact with the disk (1st problem). Second problem was that after winding back the caliper and fitting the pads, I couldn't get the pad spring back on without much physical force
. Went for a spin and ended up taken them off and putting the old ones back on.
My advice - stay away from these pads - not only is the shape slightly different (the back plating, which I believe caused the fitting problem of the pad spring) put they seem very inferior quality to the oem ones.
Hope this helps someone in their choice of pads. FWIW, I'm gonna wait till my pads wear out and replace the disks as well at the same time.