I typically only camp in campgrounds with electric hookups. Haven't had my trailer long, but the 12 volt fridge seems to work well. After a couple of hours drive time, the fridge is cold. I doubt the freezer was down to the point of actually freezing liquids, but it typically is up to the task pretty quickly after plugging in to shore power.
Works much better than the small 12VDC/120VAC/propane unit I had in my popup I never tried that one on propane however.
2020 Chevy Silverado 1500
Forest River Wildwood XLite 263BHXL