I recieved my Roomba, named Rosie, for Christmas and I love her!! We joke that she is my fifth child
. We have a hairy border collie and we run Rosie every night and we don't fill up the chamber. With three dogs you would need to make sure you run it every day or make sure you are around to empty it if it fills up. My floors have never been so clean and dog hair free. When I mop now I don't have wet dog hair showing up
! I would only get the discovery or scheduler models as they are newer and hold more, have better technology and cleaning power.
So, if you have pets or hate vaccuming this is the gadget for you. Keep in mind it doesnot work as well on high pile or shaggy carpet.