The assembly is quite easy. One must however be aware that it takes a little longer than to clean a water bowl, as the unit must be completely dismantled. After all, except the pump, of course, everything Dishwasher. The volume is disturbing only at low water level. It's just a pump and a pump are sound! Our two had, moreover, no problems with hum. You can hear the pump actually only in absolute silence.
Negatives:
- The filters can not be cleaned, must therefore be purchased new. But He who seeks will find (3 pieces for 4,50). A filter should be replaced every 3-6 weeks.
- No on / off switch
- Cleaning quite expensive
Despite the above points, I would buy it again.