I don’t have the system, and don’t know anybody who does have it. But I have read about it … on BCAN maybe … and it does sound really convenient. The video at their website shows an external connection to a “soil pipe” on the outside of the building.
Seems to me this can’t work here in Canada (except maybe Vancouver or Vancouver Island) because everything would freeze solid in the winter ….
However, if they are establishing here in the near future maybe there is some way around that.