The poll is a bit in-accurate in that some brands offer several stand-on machines that vary in features, engines, speed, and price. As far as those who had bad experiences on hills I would recommend looking for a stand-on mower where your feet are between the rear tires and below the rear "axle" line. I have cut some very narly inclines with stand-on mowers, to the point that the you have to be concerned about oil starvation. One thing to note, you can leverage your body on stand-on mowers to change the location of the center of mass and stay planted on a hill. And its easy to go near the machines limits because you can simply step off when it becomes unstable. My choice is the Wright ZK all day every day.