Poor quality washer is the understatement! Traditionally, Sears quality has been good, but the 600 washer is bad design. First, there is no gradient water temperature control. A timer switches from periods of full hot to full cold. Temperature 'control' is attempted by varying the relative time that the hot or cold are on. The result is that you can not tell what the final temp will be, plus, if you have hot temperature sensitive fabric, it will be damaged. The only way to control the temperature of the wash is to load the washer with a bucket from the kitchen sink with the desired temperature water.
Second, you can not open the lid to observe water level as the load is washing. The machine stops. They may call it 'safety' but there could be a button over-ride.
Third, The timer has only three fixed positions and does not allow a reasonable range of wash cycle times.
Fourth, the agitation begins with a harsh agitation for a short period and then a gentle agitation, but this is controlled by the machine's timer, not my judgment.
On the positive side, the machine uses a shaft drive rather than the traditional old belts.
The tub is a nice porcelain with a nice agitator.
I think the design 'engineers' of this machine were computer nerds who have never done a load of laundry. I'm an engineer and the first machine I used was a Sunny Suds in the 1930's! It was better than this one.