Welcome to the Forums!
Before you rush out and spend your hard earned cash and suffer buyers remorse, how about some temperatures as references.
Terms like "Great" and "very cold" aren't really helpful and can be misleading
I have placed one of those wall clocks on my wall which display TWO temperatures, one at the clock and the other from a remote sender. I've placed the remote sender in the fridge compartment, so now I know what's going on in there at all times.
I can tell you this,
1. Fridge temp depends on the outside temp.
2. The evaporator system, which is how these fridges work, is very very sensitive to leveling.
I've watched the internal temp rise by 5 degrees by bringing the level up by just 1/2 bubble front or sideways.
I replaced the "Coils" in my 5 year box, cost me less than $400.
My summer temps(70-92) run average:
Freezer: 5-17 degrees.
Fridge: 29-40 degrees.
I also have a fan mounted under the top exhaust vent, with a thermostat and manual on/off switch.
I find that I get 5 degree lower temps on propane
than I do using AC, which is really 12v
(Running you fridge on your battery will kill the battery in a heartbeat)
To help the fridge along, I freeze water bottles in the freezer at night, and place them in the fridge during the day.
Also, driving down the road decreases the efficiency of the cooling unit, the wind turbulence in the cooling compartment effects the flame. (save the propane on/off during travel discussion for another thread or add the already beaten to death posted thread
I've provided a DIY coil replacement HowTo you can find at: Airstream Central - Info for Airstream Owners
or by clicking on the "Articles" tab on the top of this page
So how bout we all report back with temps, please include outside air temps along with the internal fridge numbers!