Review (1/5): Not worth a penny.
These are garbage. The bags cannot complete a true seal, so dust just flies out around where the bag fits at the fan. These to not have a gasket seal to secure the actual fan to the hand rest, so more dust comes flying out of that section. You will be cleaning the dust up from the table and your face just the same. Because without a seal for the bag and the fan itself, there is no way to stop the dust from going everywhere.