We've got a resi in out TT. I was worried if I'd like it when we bought the TT, because we store the camper at a storage place, and I was concerned with cool down time, and battery life.
When I go to get the camper, the first thing I do is turn on the inverter, then hitch up. By the time I get hitched up, drive the 15min to the house, and start loading up the fridge is cold. We typically will load our clothes etc, and by the time we get to loading the fridge it is ready to go.
Our truck sends enough power to the trailer batteries that they stay charged with the fridge running while we drive.
The only reason I might consider an RV fridge is if we boondocked a lot. We are in the southeast, and there just aren't many places to camp that don't have hookups, except to tailgating at football games.