So, I rented one of these from Home Depot on Saturday. We had to remove about 550 sq ft of dirt/clay for a patio and then fill it in with 15 yards of road crush. The whole job took about twelve hours, including learning how to operate the machine from the user manual.
5 out of 5, I highly recommend renting one if you have a larger project. Easy to use and worked great once I figured out what all the controls do.