I have used lots of sets of Superstar pads and never experienced this pad problem that seemed quite a problem a yr or so ago.
I have used them for two biking weeks in Spain (Sierra Nevada mountains) and had no problems either. The firsr yr I had to change the front pads halfway throug the holiday, but they were almost gone when I went out there. This year I used pads that had already been on the bike for ~2 months & I reckon I still have a summer of riding left in them.
The only thing I recommend if you do get them is to remove the paint from around the edge of the backing plate – I used a scalpel, but a small needle file would be fine or perhaps some wet/dry paper.
I found that the extra thickness of the paint meant that they wouldn't retract very well & the pads were constantly rubbing the caliper. After removing the paint, I have had no issues.
This isn't just Superstar pads. Most aftermarket pads seem to have painted backing plates, and would probably benefit from having it removed around the edge before fitment.