Some have had issues. I've used them without problems for lighter work, but it's like the 80/20 rule:
80% of the people will be fine.
20% of the people will have some "issue".
An "issue" could be pads overheating, exploding, de-laminating, or flying across the room.
If it was me, I would just get the Rupes pads. If you drop 4 bills on the machine - why not just get the correct accessories?
I realize a person may already have a collection of pads they want to utilize, but I think the Rupes pads are "different".
For one, the foam seems more dense and seems to work better with the larger throw. I dunno if the "Velcro" is unique, but I can tell you it's perfectly matched to the Rupes BPs.
It seems that's why all pad companies (including LC) are now selling copy cat Rupes pads marketed towards large throw machines.