With my four tap system I always seem to spring a leak somewhere. Post on the kegs, the screw on C02 adaptor getting loose, Seals on the post. I went through around 3 5lb bottles. Now I threw on a 20lb bottle, set it to 13lbs and open/close the manifold controls to each keg.
It is a pain at times, but I can catch a leak very quickly by listening to the push on the gas.
Some day I may trust the system enough to leave it on all the time again, but refilling tanks is a pain, and at $25 each it kind of sucks. "Thats a batch of beer".
In Primary: Belgium Chimay clones.
In Secondary: Braggot, pale ale, end of the world white.
Conditioning: Mead, Cider, braggot, Belgium Wheat.
On Tap: Clones, Chimay Blue, Red, Porter, malted cider.
Bottles: Far, far, too many to list.