Ultra Quiet and handy

I only knew the compressor models and am excited about the non-existent noise. That the device only works with batteries for me not a disadvantage, because I prepare it in the bathroom or in the kitchen and can inhale in CD or watching television almost incidentally my kids in bed
Processing seems okay, although the plastic connectors worry me a little bit. I'm hoping for the promised 3 years warranty.
For our needs, it is just right for a reasonable price.