Potscrubber, noise, water use
The Twenty-Eight Hundred is so very well sound insulated that it is not noisy, it's quieter running that any of our KitchenAids have ever been.
We are, however, talking about a level of sound insulation you would otherwise only find in a top-notch sound studio which has to work while their street is being torn up with jack-hammers.
As to the water usage - for those too young to know what we're discussing, here's the normal cycle for most Potscrubbers over the last roughly 40 years (they're still made, if only as a BOL).
Pre-wash (up to 20 minutes heated in some models, especially Kenmore).
Pre-Wash (just a quick one, may have a running water purge in some).
Pre-Wash (short, may use less water than the first two in some models).
Wash (heated in all versions, may incorporate time delay/thermostatic control and or both)
Rinse (may have running water purge in some models)
Rinse (short, may use less water in some models)
Rinse (may be skipped, may use running water purge in some models, may use less water in some models).
Rinse with rinse-aid, heat, timer delay/thermostatic control in some models
Now, before those who only know the universal mechanical timer or the GSD 2800-3D say the above ain't true, please go try a 1200 with the multi-orbital arm (the one it supposedly didn't have) and get back to us.
GE has fiddled with the rinse cycles even more than with the pre-wash cycles through the years and the original timers were all over the place in how they ran. GE standardized replacement heaters at only about 500W for all potscrubbers and offered first two then one universal timer for all (with modification, it works, too).
One characteristic of all of them: Tons of water used. It's a big reason they clean so well and don't leave yibblets.
Second characteristic: That gigantic passive filter in the back of the tub on the MOL/TOLs for decades WORKED. When they replaced it with the ring-around-the-tower-of-power, it was a disaster. Gummed up constantly, was designed to work with phosphates and failed MISERABLY without them.
Noise: A lot of it is the gigantic fan in the shaded-pole motor which GE chose for the potscrubbers and only replaced with a capacitor start much later. They're interchangeable, but the discussion as to why they chose a shaded-pole for such a large motor is still ongoing.
It has a few advantages, not least: They are the most reliable and trouble-free motor built. Unlimited lifespan (many are still running perfectly after over 100 years, in service).
No capacitor, no complicated wiring.
As these things go, an exceptionally friendly motor to logic and other electronics. Given the cost and vulnerability of electronics in house-hold appliances back in the day (make that vulnerability, today, too), this motor was an outstanding choice.
Disadvantage: Because the starting torque is weak, weaker, weakest of all practical electric motor designs, they had to over-dimension it enormously to guarantee it would start under load.
Disadvantage: Produces lots of heat, partially because it's over-dimensioned, partially because it's inefficient, so a gigantic cooling fan is needed. Enormous.
All in all, though - what matters is the performance. Any Potscrubber with the multi-orbital arm will do a better job of washing dishes clean, all else being equal than any other home dishwasher. Add in the power-shower (which many consider useless, though I disagree) and that filter and you have no yibblets, a dishwasher which will clean your dishes sparkling clean even if your young helper puts the percolator basket into the machine without emptying the coffee grounds.
But, heh - we still hear how cheap and dreadful the GE Filter-Flo was and how wasteful the P7 was...some people just can't get past the harm done to the company in the 1990s by Welch. Understandable, but it's as if one were to take a WCI Frigidaire washer and then tar and feather the Unimatic based on the Franklin transmission in that hunk of plastic WCI called a 'Frigidaire'.