I have a 6' Kingkutter I purchased this year. Have only used it on about 3 acres but not problems. I don't use a tiller a lot but have not had any problems. Used it on a yard for replanting. The ground was very hard but worked well. My only complaint is my Spee-Co quick hitch will not work on the tiller. The lift pins are too close to the frame and will not allow the quick hitch to lifting hooks to fit over the pins. When time permits, I will probably weld on an extension so I can use the quick hitch. IMO, for the money and features it is a best buy tiller. (more tines, slip clutch, gear drive) Mine also leaks a small amount of oil from the gear drive case but it is minimal and not a real issue. Yes, the owners manual is a joke and nearly useless.