You buy the unit, you buy the plastic bag inserts, you open the lid and insert soiled diaper and close then turn the lid three rotations. When full you empty a string of wrapped diaper bundles. Buy more plastic inserts.
Save the insane amount of plastic bags every shop gives you, keep them flattened on a clip next to the changing table. Pull bag off, shake open and toss diaper in and then tie in a knot and toss in trash. Your hand comes in no more contact with the diaper than with DG, plus it is free.
Unless you have trouble with knotting a plastic bag due to some disability why use a diaper genie? In fact cranking the thing for three rotations seems harder.,