I have looked at the reviews for this product and almost all were very positive. There are other testimonials on other sites that include photos of large piles of dog hair and other debris. They took before and after photos and the difference was surprising.
I doubt that I would have used my vacuum on such a large pile. It does seem, by the reviews to be a very impressive machine.
There are some things to consider if you are deciding on a robotic vacuum cleaner such as carpet/linoleum transition, how much clutter you have in an area (they can, and will get stuck) on other robotic vacuum cleaning issues discussed here:
roomba vacuum cleaner review and
robotic vacuum cleaner review.
It would be a good idea to be able to address these concerns before the big purchase, but so far this looks to be a nice little vacuum.
Good Luck!