I'm always impressed when someone reports that they get superior results with one of those, only way to go, etc.
I've owned a Cobra torch for many years, bought back when it was called the "Dillon" torch, or maybe the "Henrob", I don't remember, as it's been that long - It's gone through a couple name changes, I believe.
I used it a LOT, with some really good low pressure regulators, but a while ago I went back to my Smith aircraft torch, and I think I prefer that set up over the Cobra - It just works better for me.
The one nice thing the Cobra has, though, is the single jet cutting head - You can slice metal pretty good with that.
But for welding, I think I prefer the Smith.