None of them are particularly complex to plumb in: your water intake goes through it and out the other side. Machine has an overflow which goes into the drain. The intake is also t-d off so that you can bypass the machine should you want need via stopcocks, then a separate hard water feed for drinking water/plants.
We use a Kinetico, but also considered Ecowater.
Couldn't recommend it enough.
None of them are particularly complex to plumb in: your water intake goes through it and out the other side. Machine has an overflow which goes into the drain. The intake is also t-d off so that you can bypass the machine should you want need via stopcocks, then a separate hard water feed for drinking water/plants.