03-10-2014, 05:20 PM
No experience with it and never will have I'm afraid. First off it sounds like so much snake oil to me (JMHO), and secondly a single tank of gas (125 cu/ft) lasts me at least 10 years with the amount of welding I do at home. And the only time I've ever had a problem with insufficient gas coverage at the start of a MIG or TIG weld was when I forgot to open the valve on the tank. 
Forgetting to close the valve at the end of the day has probably wasted more shielding gas over the years than that system would have ever saved them anyway.
Forgetting to close the valve at the end of the day has probably wasted more shielding gas over the years than that system would have ever saved them anyway.
Willie