It's not the lack of a dual link part, but the easy network bandwidth congestion part thats the problem with z-wave. I used to use insteon in a small test buil

It's not the lack of a dual link part, but the easy network bandwidth congestion part thats the problem with z-wave. I used to use insteon in a small test build out, but got frustrated with their bad software support. You have to use a ~$300 hub with a $80 PLM modem before you can get something half decent. And Insteon devices having a reputation of breaking after a couple of years due to using cheap capacitors and such put me off from using it any further.