Anyone run BERU plugs?

I recently pulled a set of BERU N/A plugs from a t5 that had about 60k (miles) on them.

They were WASTED.

This is the second time I've pulled N/A plugs from a turbo Volvo. Apparently it's commonplace in this neck of the woods to use whatever is on hand.

I'd honestly never even heard of them, and strangely, there were no signs od pre-ignition/ detonation in this motor.
Certainly noticed a world of difference after dropping in a new set of the proper OEM plugs.

Thanks in advance for any comments.