These waste cans are very nice looking and work great.  I'm glad I read reviews before ordering ~~~ I went and bought C cell batteries ahead of time.  
Super simple to put both cans into service immediately.  I use the larger unit in my kitchen.  The smaller unit is very handy at my desk.  
I like the removable collar that slips on after a bag is inserted; it holds the bag tightly in place.  Odors are contained (if the lid is closed.)  
Highly recommend, especially at the bargain price!