See below: Pros: smart. Effective. Easy to use &clean up. Cons: not whisper quiet. Won't clean as well as a regular vacuum with one cleaning. Still gets tangled up on rug tassels and long wires. Can't vacuum stairs. No hepa filter bottom line: if you're tired of vacuuming, or simply don't do it often enough, irobot's roomba 770 vacuum cleaning robot, while not perfect, is an effective automated solution.
Probably not. There are no published studies comparing vacuum systems in asthmatics to see what maximizes symptoms reduction. That said, it does not appear to have hepa filters, and may miss dusty areas (being a robot).