My mother in law was complaining that with old age it was becoming more and more difficult to keep her place clean especially because of her two cats.
We helped her setup the Shark Matrix Robot vacuum and let me tell you what a difference this little robot makes for her now.
She has it on a schedule where every morning at 9am, the robot start vacuuming. 
We witnessed an immediate improvement in the state of her carpets as this little thing is effective at removing all the dirt, leaves, and cat hair that has been on her carpet for some time.
This is a great product. We love it!