I built one similar to a Swisher for a friend. He loves it. A person should buy the piece of equipment to do the job at hand, which is what it appears DMG did. Nowhere on Swisher's website does it say that it will do ditches and roadbanks, so I would not surprised that if it won't do them. However, it does do a great job for what it is built to do, and anyone with a large flat open yard will appreciate one if they are trying to decrease the time it takes to mow their yard. Heck, my boom mower doesn't do flat yards worth a darn but for some reason I am not surprised about that either.
The right tool makes the difference.
David from jax