Strengths Great visibility, big wide open dual doors, spacious cab, and i love controls on my right side. The power reverser is excellent--i don't know how i got along without one all these years. The powerquad plus transmission with push button shifting is a breeze and a much nicer way to shift. Fast responsive hydraulics. Push button 4 wd is a nice feature, no need to stop to engage on the side of a bridge embankment.

Weaknesses This tractor does not seem to be able to lug as much as my 6403. If you start going up a hill with the 6420, the engine pulls way down, where my 6403 didn't pull down half of what this tractor does.

Overall Good tractor, very easy to operate once you get used to. Would recommend this tractor to anyone. This tractor has triple remotes, 16/16 power reverser tranny, front rear wash wipe, joystick control for loader with loader suspension system, airride seat, climatrak climate control which is awesome, beacon light, front fenders, rear fender extensions, cd w/ weatherband, extra floodlights, passenger seat, dual cup holders, field office, extra overhead storage compartment, front and rear weights.