I didn't replace the Norcold, but I did replace my Dometic. The Samsung I installed was a perfect fit. About 3/16" on the left and right and about 1" on top. A little bit of trim and it looks like factory. I finally installed a 600w inverter a couple of weeks ago and it is powering the entire circuit. The only issue we have had was when my wife tried to use the toaster the pantry circuit. Now I need to change circuits for that outlet. It took my wife and I about 2 hours to remove the old fridge and woodwork. When the delivery guys brought the new fridge, they slipped it right into the opening. Removed the vent in the back, plugged it in, and replace the vent cover. No sweat.
Fulltimers? Loving our 2012 36RL towed by 2016 Ram 3500 DRW Longhorn Crew cab with auto level system.