It's still distribution tubing - strictly for one or two plants. Pros that use that stuff might run a ring of it around a larger plant, but they don't run long lengths of it. Use larger diameters for that.
It can be used very effectively by ringing individual plants planted around a house or running up to 15' lengths in a small bed. I am certain it is not used frequently by professionals because it is labor intensive and most home owners will not foot the bill.
But, back to my original question, has anyone had experience with it?