Yes, they had their limitations alright.
 
From what I can recall the biggest service problem was that the internal two Gases (?) separated & to rectify it one had to turn the Cabinet on its top for an hour or so. 
That apparently sorted those out but the Absorption system was always behind the eight ball with cooling.
The other Icy Ball System in that link was another thing altogether.  I "had the Privilege" of being shown possibly the last operating one in Adelaide at that time in a Butcher's cool room just off Anzac Highway but this one was different in that an electric motor (a Wagener RI Brush type) drove the balls or one (?) via a flat drive belt to the second one in a Brine Bath on the Cool room Roof.
That one should really have found a home in some engineering Museum somewhere sadly it was probably scrapped when the building was demolished.
 Today's"DROP-IN PLUGS" owed their beginnings to some of these systems in that when manufactured the smaller ones servicing could be lifted out of the top of the cabinet that were fitted with Sealing gaskets.
I tell yer, there is nuthin new in the whole wide world just that some "bright" young engineer reckons he has revolutionised refrigeration systems.
Well let me tell yer sonny Jim, there ain't such a thing.   ( Attributed to Adam Lindsay Wordsworth)
 
EDIT.
  RE Cold Spot Refrig.   Audells   (remember that, The Bible?) printed USA 1944 tells me that it's Gas Charge was 2lb of liquid Sulphur Dioxide & most at that time would have been the same.
Many also were fitted with Rotary Vane Compressors, certainly a new thing back then.  A spring loaded vane ran on the surface of the shaft & was the difference between the Hi & Lo sides
Looking at Audell's flyleaf I see it cost me 42/- & I recall paying back my old boss each week a couple of bob.
Ah, Happy Days.
EDIT.   Paul have a shufti at this link which I found most interesting.
Refrigerator - General Electric (GE), Monitor Top, White, post 1935
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