I've just placed an order for some today, as apparently it will work with a PC, just with a long working time. From what I've seen, it will finish down as well as PG, but doesn't have as much cut. So I think the warning on Autogeek is just that: a warning.
OCC was really quite weak for me for a 'compound' so I suppose that's why they're releasing this product.
The only other compounds I have are PG and SSR3 and both finish quite nicely, but I'd still rather do an additional polishing step especially on darker colors.
I'm quite keen to try this new OHC by DA and rotary and see how it goes.