I've got one that is second or third hand and it works like a champ! I've never had it stop pulling and have hooked it to some pretty crazy stuff! My 6,000 lb tractor buried in a swamp,pulled up trees ,a 4 door Tahoe up a 12' prob 35* or so angle not running when it crested the hill coming up on to the road the back tires weren't even on the ground! Maybe I got one of the good ones but I wish I had another just like it for my trailer!