Watched the video and my thoughts are:
1) Projected costs - £30/Month for the chemicals. Ouch!
2) Can't empty into septic tanks - no you SHOULDN'T, but there is nothing to stop you doing so. Oh, I wonder what will actually happen in reality? And those drainage gulleys in car parts and on the roadside suddenly become a lot more useful
well, saves the occasional need to visit a campsite for your ablutions
Wild Camping ... how do you know if any water drains go to a treatment plant?
Campsite - again, how do you know without asking? and imagine the response to the "
is your grey waste drain connected to the mains sewage system? I want to empty my toilet contents down it" question. So people will just not ask, but use as if it were I would say"
I think using the Grey Waste to flush the Toilet makes a great deal of sense, but this Indus system is only (IMO) suitable for countries that are setup for RV (hint) designs/standards that have a Black Tank setup as the norm. For that, it would seem to be a much cleaner way.
If you had a way to empty the Black tank by set quantities into a container that you can take to an Elsan point, you would end up with a cleaner emptying process by the sound of it, plus where available & appropriate a full automatic emptying procedure, so that could be useful. Alongside that, a way to empty (full or partial) Grey Waste to allow you to use Septic tanks would be very useful.
I would say the above two things could be totally doable via a small re-write/update to their app that controls a flap solenoid that opens and shuts on command (the button Dutton presses probably activates an solenoid anyway?)
My end conclusion.... not suitable for responsible UK or European Motorhoming as it stands and at worst will allow and encourage poor and even irresponsible behaviour from users who either just don't know when not to empty, or just won't care.
It's a no from me.