"I normally use a specific brand of sanding pads, but Screwfix don't stock them, despite selling the sander that uses them, so I bought these and some other grades from the same manufacturer.
Within two minutes use, the hook and loop fastening was giving up and within another minute, the pad wouldn't stay on the sander at all. The abrasive surface remained virtually unused, but the pad could no longer be used at all. I took them back and got a refund.
To put it into perspective, the backing on the branded pads will generally last for more than a day of use and only need replacing when the abrasive is worn out or clogged up, while these ones only lasted a couple of minutes of unusually light use before the backing failed.
I can see no problem with the abrasive side, but the poor fastening makes them useless."