I may be impartial, as I am a fan of the Neptunes...as I have 7 sets and a few spares...
they have been more than effective for what I have thrown at them....
granted my water heater is set at 180, 98% of the loads are either Hot or Warm, a good detergent, bleach, ammonia, borax, softener as needed....purging the line before starting...
normal loads take about 45 minutes...and the dryer falls within the same time frame...
there is no 'clean washer' cycle....to which if you follow the guidelines above, will never need one...
there are options of PreWash and Stain Cycle for heavily soiled laundry....extra detergent and an extra rinse really work well for this type of a cycle...
these operate with very little water in the beginning, which really super concentrates the detergent lather, and adds more as the cycle progresses...
note too, Neptunes and Frigidaire Gallery round door, were created way before the tight water restrictions took effect, these fall well below the Tier 1 guidelines, you really want to stay away from a Tier 2 or 3, the higher the number, the less amount of water used...
I also own/used other FLers, Frigidaire, SQ, LG, Whirlpool.....for the most part, all have been effective...pros and cons with each..
the main thing you want to do if picking out a used machine....plug it in and run a spin cycle, it should be silent, if not, move on...
keep us posted on your progress