We purchased our DC from a rural dealer (now deceased) and could not be happier. The only maintenance issue was a poor connection in a cannon plug which operated the electric clutch on the cutter blades. Once I identified the correct plug, I cleaned and packed the plug with grease--no more problem.
I suspect that the dealer washed the machine to get the dirt and dust off and water entered the plug housing causing corrosion. I learned to use compressed air to blow off the grass and cutting debris instead of a water hose. Too many exposed safety switches to damage with water.
This machine made a 3 hour job from a 6 or 7 hour job with the previous lawn "tractor". It nearly needs a seatbelt. You can cut medium height grass and weeds at 10-15 mph forward speed.
The hydraulics are smooth and easy to operate. The tires may be a bit aggressive for lawn grass. If you barrel up to a corner and slack off on the forward speed fast, the rear wheels slide and tear up the grass. You have to develop a smooth style for stopping and starting. It will spin the tires when turning up the speed again.
Also, unless you already have experience with Zero turn mowers, don't push one lever one direction and the other opposite unless you don't mind huge divits in your lawn. Smooth gets the job done!
I have a 25 hp Generic engine that is very powerful and smooth. It also likes gas. In the three hours needed to cut the lawn, it uses about 5 gallons. This is more fuel quanity than my John Deere tractor pulling a 10 ft. bush hog. Other than the fuel flow, the engine has been flawless.
Great mower. Would buy another if I ever needed another. Great quality means that I probably will pass this one down to my grandson.