I remember reading (or watching) about these shower heads and IIRC, there is very little current making it's way into the water (or at least it wasn't traveling

I remember reading (or watching) about these shower heads and IIRC, there is very little current making it's way into the water (or at least it wasn't traveling very far down the streaming water to reach the bather, I don't remember the details). I reckon if the mineral content were just right, it might not end so well though.