I generally vacuum once a week (whole house) with a Dyson. DH is convinced we need a Roomba as well to do a daily vacuum of the open-plan living/dining area. I'm not convinced it's worth it because I generally just sweep that area every second day or so and it takes about two minutes.
Would it be more trouble than it's worth, in terms of putting chairs on the table etc so that the Roomba can do under the table effectively? To me it's expensive plus needs storing...
Are they noisy? Do they do a decent job?
The floors are part tiles, part wood.