Dad and I had them for maybe 25 years.  Picked seed corn.  Main/only picker at the time for seed corn.  Then people learned/discovered Byron and Pixel machines.  In one year Uni pickers could not be given away.  Those Byrons on a Uni mule were a dream come true.  No husking bed on the Byron.  Pick 2-4 times as fast, had a swinging elevator to the side for side loading while picking, all greaseable bearing, think I has one bearing fail in 10 years of use.  We just had the Byron 501. 

Uni were never operated by the engineers who built them.  Jacks that were to lift the husker or combine would sheer a pin and fail to work, screen hole size to small around the motor and would let all kinds of trash in in front of the radiator, very small front and rear tires, way to much weight on the left side where the motor was, not enough weight on the right side, very poor in wet conditions, small rear tires would slide instead of turn in wet condition's, the list could go on for ever. 

Good idea, just never built right.