I have only had the vacuum a couple of weeks but it has made my life so much easier.  I had a Shark vacuum before but it had the standard "brush roller" and I have several animal and a wife with long hair! I spent a long time pulling out all the hair, fur and thread.  With my new machine, it takes care of all of that and is so physically easy to operate..it partially vacuums the house by itself, has plenty of power and has taken so much dirt and sand out of our carpets...we live in the desert so there is plenty of sand to go around.  Our house is just 100% cleaner.  Thanks Shark!