I had one that ran for over a decade including the hard use of my college years. It worked quite well but I had to buy a valve that allowed me to keep a measure of how much gas I had so I wouldn't run out unexpectedly. It was far more expensive to operate than the $400 price tag it had at the time, between the electricity and the gas it always cost more than just buying beer a six pack. Not to mention when you're entertaining! Usually some friends will bring over their own beer to drink or if they grab one out of your fridge there's may be some social norm or universal understanding where people say "I'll get you back" well throw that right out the window with a kegerator. It's impossible to police, no one is reaching into a fridge to take a commoditized item they understand the value of, in there eyes it's just beer appearing magically like free water from a tap. It's a slippery slope too, you start buying tap handles and accessories. It's one of those things like owning a boat, I was happiest the day I got it and the day I got rid of it.