Roomba questions

Anyone have a Roomba?  (paging

nicoleallee

and

johnbrandon

)

With two cats, two litter boxes, a couple cardboard scratching posts, and a couple shedding feathered cat toys, I’m feeling the need to vacuum really often.  And recently I was utterly grossed out when I looked under the bed, where my traditional vacuum can’t reach.

Questions:  does it do OK transitioning from carpet to hard floor?  does it freak out if it finds a shoelace on the floor?  how about a pile of paper clutter?  what else should I know before indulging myself, here?