One thing I didn't notice anyone else mention is the massive size advantage to the residential. For my trailer it was a 12 cubic ft RV fridge or a 23 cubic ft residential. With our old trailer I could never fit more than 5-6 beers or other drinks in the fridge because we needed the room for groceries. Now I can set several cases in there with room to spare.
Ours has a round handle with a piece of threaded rod attached to hold it closed. The female end is glued to the fridge in the space between the doors and you just thread it in where all 3 doors meet and it holds it nice and tight. I would take a picture but it's put away for winter already.