09-17-2013, 08:46 PM
Wheels down makes life much easier. There's no side to side pull (torque). It makes the machine track in a straight line. Overall the machine handles smoother with practically no effort at all. And the large wheels make it easier to transport and to climb steps. The difference is that a day of working with a standard machine will wear against your body, whereas with wheels down you can work all day with minimal fatigue. And all of the scrubbing energy gets transferred to the carpet instead of up the handle of the machine, so the argument is that there's a scrubbing advantage too.