Kind of cheaply made the way the hatch opens to empty the dust put. Careful not to sneeze with the hatch open because you will break the hatch. The filter changed easy enough but not the pre filter. It looks like a special a tool needed to get the prefilter out. 
The first unit it was used a lot but the motor came loose. Cheap, 
cheaply made. Bet it won’t last as long as the bd Dustbuster.