I've only used mine a few time and have had no problems, BUT if you buy one pull the gearbox section down clean out the crap the Chow's call grease and pack it chockers with a good quality grease, I used Marine grease as it doesn't absorb water as readily as normal grease.
The wire rope at 8.3 mm does not have a Safe Working Load (SWL) of 4310kg (9500lb), but about 850 Kg SWL, the 4310kg advertised is the Guaranteed Breaking Strain of 8.3mm 7 strand wire rope and you dont want to be operating a winch with a wire rope at the limit of it's design, the winch will probably pull more with no problems, but the rope is not up to it, the wire rope on my winch is 11mm, remember the SWL load of a winch is determined by the SWL of the wire rope used, Regards Frank.