well, I broke down at the Hershey Show yesterday and bought one of the ultrasonic detectors. It is going to be handy just to know about how much is left in my tanks. Of course I checked out my tanks as soon as I got home.
Here is my reasoning to get one....It will be real convenient to have a general idea of how much gas is left in my tank(s) when I'm prepping for a trip, instead of removing the tank and weighing it. Especially if I'm heading by the propane store for something else. Just like I like to keep stocked up on beer and gasoline for emergencies, I like to keep plenty of propane for my fridge to keep said beer cold
Really though I also like gadgets.