I haven't used the duster, but I have the robot vacuum, and love it.

I bought one similar to it that was about half that price (and built half as well) and used papers similar to the swiffer cloths. It worked ok on laminate flooring. Was a big help with pet hair

How can it do corners when it's round?

I use the "Mint" my son got me for Christmas. It's name is Gilroy, because Gliroy was here. I love it.

They woud scare my 20# kitty to dealth. He is the biggest scarity cat. I call him my security guard. If he hears someone coming he runs. LOL Lets me know when someone is here.

I also wonder how any of these does corners and handles all the little pieces of thread.