Not true. Inclines, ditches, undulating "moundy" ground, get one with a floating deck you control by foot. I've mowed some crazy terrain from a friends insanely crazy few acre lot on Lake Buchanen to a 12 acre community park (seriously sloped down to the COE water) on Canyon I used to live in years back. Everything in between with rocks, cedar stumps, whatever. I had a 60" X Mark with a 27 hp Kawasaki and it was a beast. It had a foot controlled floating deck with 8" variance and after I got used to feathering it it'd mow anything on any kind of slope. Have a 54" JD now for my few acres and it's a turd compared to that X Mark.