They are neat. I am using the handheld trump level check to keep track of the liquid level in the propane tanks. Also a great tool to be in the know on your remaining propane.
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.