They're pretty cack, as reflected in their prices! Very roughly made, virtually a knock-off off the CWC etc, even to the point of false claims of being Mil-issued (if memory serves).
I think the Mil-style ones off eBay from the HK seller are as good a Mil-spec you can get for sub a ton, can't recall the sellers name but heard they're okay.
EDIT - here ya go http://cgi.ebay.co.uk/British-Satin-Plo ... 0718136277