Our instructor is working with a distributor for this stuff. We just installed it on a trane XL18i and they are working on getting it approved.
There is no need for insulation on the suction line because it doesn't sweat, fairly flexable and doesn't have the kinking properties of copper(imagine a 300ft run with no need for fittings), compression fittings so it stays cleaner inside because of no brazing, and it is cheaper.
I hate the fact that it doesn't require brazing. Takes away from the trade, but other than that it is pretty cool stuff.