I am not discouraging you but those things aren't popular and mainstream yet. For if you think this would solve any of your head ache its gonna infact give you, There are cuts and corners in the house, There are furnitures etc, then there are stuffs sometimes that are un-sweepable, then kids and adults walking around, so its not worth to get one of these. Technology is improving I am sure something better might come soon.
But you can still call their helpline and ask for a demo, you might change your mind after having a look at the little buddy and however its a really cool gadget to own.
Hope this helps