Yes, I have used that looms strop several times. it woeker fine, bit after the second use, the leather started loosing it's top layer, leaving a sort of debris on the surface that compares to what an pencil eraser leaves on a piece of paper. That didn't seem to interfere with good performance. If I rub the surface with my hands, more of that stuff comes off. I'm sure that if the strop was pasted, I wouldn't have noticed this, and since the strop is actually meant to be pasted, I do not consider this any kind of flaw.
Since then, I've put it aside, for use with a future experiment, where I would like to test a couple stropping agents that are softer than steel (unlike the true sharpening pastes). I'm thinking cigar ashes, chalk, etcetera.
The tensioning system, which is of course the heart of every loom strop, is brilliant. I can make a bunch of replaceable loops, and change them according to the paste and substrate I'd like to try.
Next time we meet (likely in Brussels next month?), I'll bring the strop with me, to show you the peeling of the leather.