We've had our old (other brand) robot for a few years now, and I was always left wondering if there just some known things that can't be solved by robot vacs.  I am pleasantly surprised to say I was just wrong.  It's amazing how much these things have improved in the past few years.  From mapping to cleaning and everything in between.  

We've been using the Shark AI now for a couple weeks and we can definitely say, the difference it's easily noticeable.   While our dog doesn't shed, she does bring in more grass than I thought was possible. We run the roomba each evening and wake up with out out a drop of grass in sight.   

Lastly, the mapping abilities with the AI version are second to none.  I no longer have to worry about our glass cabinet shattering for turning on all the lights in the house, just to let our robot do its thing. All in all, these is a great device.