I was frustrated not being able to buy distilled water for my CPAP machine or dehumidifiers that I have. I wanted a simple yet elegant device that matched my kitchen decor. I'm happy that this product meets all of those requirements and more. The second photo shows the residue left over after filing the pot with tap water and running it. It was smelly and had a brownish color to it. I have tap water that meets federal standards, and these trace minerals are likely healthy for me to drink, but they are unhealthy for me to breathe through my CPAP or dehumidifier. I will recoup my money from not buying distilled water or paying for gas to find stores that carry it.