The system doesn't look like it is anything other then a glorified UGF (which I hate) paired with an HOB filter that has Nitrate absorbing bags inserted into it.
The nitrate absorbing bag is kinda cool, but to say this is a water change-less system doesn't take into account the need to vacuum gravel.
I'm all for not changing tank water. It's a pain even when you have a Python, but I don't see this system giving anyone anything but a disapointment.
Just note: you can already go without changing water by setting up a densely planted tank, and only keeping a few fish. With enough plants, and few fish the nitrate levels will be kept in check.