Propane Tank Level Indicators

I figure I should be smart enough to check levels on occasion, and therefore use the auto switch-over. Getting up in the middle of the night to switch tanks, when the auto switch-over will do it for me just seems silly. And it's almost guaranteed that the tank will run out when it's most inconvenient. Some things just work, and the auto change-over is one of them. Never had a problem in over 15 years.